Samantha Stosur

Stosur started the grass season playing at the Aegon International. She defeated Sabine Lisicki in the first round, before losing in the second round to sixth seed and eventual champion Wozniacki. Having beaten Black and Huber in the semifinals, she was a runner-up in the doubles tournament, losing the final to Ai Sugiyama and Akgul Amanmuradova with Stubbs. As the 18th seed at Wimbledon, Stosur defeated Bethanie Mattek-Sands and Tatjana Malek, before losing in the third round to 13th seed Ana Ivanovic. In ladies' doubles, Stosur reached her second consecutive final, this time partnering Stubbs. The third seeds beat second seeds Anabel Medina Garrigues and Virginia Ruano Pascual in three sets in the semifinals, but were defeated in the final by fourth seeds Venus and Serena Williams in straight sets. Stosur was also defending the mixed-doubles title with Bob Bryan, but the second seeds were defeated in the quarterfinals by ninth seeds and eventual champions Anna-Lena Grönefeld and Mark Knowles.

Stosur started her grass-court season at Eastbourne where she was the 16th seed and therefore received a bye to the second round. She lost to Tsvetana Pironkova in straight sets. Stosur then played at Wimbledon where she defeated Danka Kovinić and Urszula Radwańska to equal her best showing at Wimbledon. In the third round she lost to Vandeweghe in two sets. She also contested the women's doubles partnering Daniela Hantuchová where they fell in the second round to Dellacqua/Shvedova.

Stosur started her 2016 season at the Brisbane International, where she won her opening match against qualifier Jana Čepelová, but lost her second-round match to sixth seed Carla Suárez Navarro. She then reached the quarterfinals in Sydney, defeating Roberta Vinci and Daniela Hantuchová, before falling to eventual finalist Monica Puig. She then suffered an opening round loss at the Australian Open to Kristýna Plíšková in straight sets.

Stosur began her Asian hardcourt swing season with a first round lost as the 16th seed at the Wuhan Open to Caroline Wozniacki. This was backed up with first round losses at the China Open and the Hong Kong Open falling to Zhang Shuai and Nao Hibino both in straight sets. Competing at the WTA Elite Trophy in Zhuhai as the eighth seed, Stosur lost both of her round robin matches to top-seed Briton Johanna Konta and 11th seed Frenchwoman Caroline Garcia both in straight sets. Stosur ended the year ranked No. 21 in singles.

Stosur began the season at the Brisbane International with a first round lost to fourth-seed Garbiñe Muguruza in a three-set thriller. She then competed at the Apia Sydney International where she lost to Anastasia Pavlyuchenkova in straight sets. This was her eighth straight loss in the five months since her win over Camila Giorgi at the 2016 US Open. She then fell to Heather Watson in the first round of the Australian Open in three sets. Stosur ended her five-month losing streak at the Taiwan Open where she was the second seed. She defeated Montenegro's Danka Kovinić in straight sets to set up a clash with Slovenian qualifier Dalila Jakupović and defeated her in three sets. Her run ended at the hands of Peng Shuai of China in the quarterfinals in straight sets. Stosur withdrew from Australia's Fed Cup tie against Ukraine due to lack of form. She then competed at the Qatar Total Open where she reached the quarterfinals. She defeated Latvian Anastasija Sevastova and eighth seed Barbora Strýcová before falling to Slovak Dominika Cibulková in straight sets for the first time. At the Dubai Tennis Championships, Stosur was seeded 12th. She defeated Chinese qualifier Zhang Kailin in straight sets in the first round before losing to Croatian teen Ana Konjuh in straight sets in the second round.

Stosur's next tournament was the Indian Wells Masters, where she was the 16th seed. She lost her opening-round match against German Julia Görges in a three-set thriller. After that disappointing run, Stosur bounced back at the Miami Open where she was seeded 14th. She reached the fourth round after defeating in-form fellow Australian Ashleigh Barty in the second round, avenging her quarterfinal loss at the Taiwan Open by defeating Peng Shuai in three sets before her run ended at the hands of Simona Halep in a three-set thriller. Her next tournament was the Charleston Open where she received a first-round bye. She beat Serbian former world No. 1, Jelena Janković, in straight sets before losing to Romanian Irina-Camelia Begu in straight sets.

At the Toray Pan Pacific Open, Stosur won her opening round over Alexa Glatch but was defeated by Maria Sharapova in the second round with Sharapova dropping just one game. Seeded 15th at the China Open, Stosur lost a three-setter to Alizé Cornet. Stosur then played in Osaka as the third seed. Stosur reached final after defeating Alexandra Panova, Akiko Morigami, Jill Craybas and Wozniacki. Stosur captured her first-ever WTA title by beating Francesca Schiavone in the final in just over an hour. This win secured her a spot at the Commonwealth Bank Tournament of Champions held in Bali. She also qualified at the Tour Championships in the doubles event partnering compatriot Stubbs. They lost a hard-fought semifinals match against No. 1 seeds Black and Huber. Stosur was one of only two players on tour who played at both year-end championships. The other one was María José Martínez Sánchez, who was in Stosur's group at Bali for the round-robin stage with Ágnes Szávay. Stosur won her first match against Szávay in three sets but lost her second to Martínez Sánchez. This loss cost her the semifinals spot, as Martínez Sánchez won both her round-robin matches.

Stosur began her US Open Series campaign with a straight-set loss to her doubles partner, Lisicki, in the second round of Bank of the West Classic. However, Stosur bounced back at the Rogers Cup in Toronto by reaching the final, having defeated Li Na and Agnieszka Radwańska along the way. Stosur was defeated by Serena Williams in the final in two sets. She then competed in the Western & Southern Open in Cincinnati. She defeated qualifier Eleni Daniilidou in the first round. She would then face Serena Williams for the second week in a row in the second round. However, Williams withdrew because of a toe injury, resulting in a walkover for Stosur. In the third round, she defeated fifth seed Li Na for the second time in two weeks in three sets. She then faced Sharapova in the quarterfinals and lost in straight sets. Stosur was seeded ninth at the US Open, and she drew Sofia Arvidsson in the first round and defeated her in straight sets. In the second round, she defeated American CoCo Vandeweghe. The third round was one of Stosur's hardest matches against Nadia Petrova, finally prevailing in three sets after a 3-hour-16-minute battle, in what was the longest women's singles match in the tournament's history (which it was broken until Johanna Konta and Garbiñe Muguruza four years later in 2015). She played Maria Kirilenko in the fourth round and won in three sets. The second set tiebreak score of 15–17 was the longest in any Major in the history of women's tennis. She then beat second seed Vera Zvonareva, to reach the semifinals for the first time. Stosur followed this milestone with a three-sets win over German player Angelique Kerber to reach her first US Open singles final, where she defeated three-time champion Serena Williams, for her first Grand Slam tournament singles title, the first by an Australian woman since Evonne Goolagong won Wimbledon in 1980.

Her first tournament in 2015 was Brisbane International, where she lost in the first round to Varvara Lepchenko despite leading 5–1 in the final set. In Sydney she reached the second round, where she lost to Barbora Záhlavová-Strýcová. Stosur then played at the Australian Open as the 20th seed. She defeated Monica Niculescu in straight sets before losing in the second round to CoCo Vandeweghe.

Stosur began her clay-court season by travelling to Charleston as the ninth seed where she lost in the second round to Lara Arruabarrena. Her next tournament was the Premier Mandatory in Madrid where she defeated the world No. 12 Angelique Kerber in the first round. She then played Kaia Kanepi and won in straight sets. She then lost in a close encounter to eventual finalist Svetlana Kuznetsova. Stosur next played at the Italian Open but lost in the first round to Anastasia Pavlyuchenkova. Stosur was awarded a wildcard at the Internationaux de Strasbourg and was the third seed. She crushed defending champion Monica Puig in straight sets. Stosur then received a walkover against Lesia Tsurenko and defeated fellow Aussie Ajla Tomljanović and Sloane Stephens to reach her first final of 2015. In the final, she faced Kristina Mladenovic of France and came from a set down to record a victory, and win her seventh title on the WTA Tour, her first on red clay. Stosur then played at the French Open as the 26th seed. She defeated Madison Brengle and Amandine Hesse before losing to defending champion Maria Sharapova in the third round.

Stosur returned to clay courts, playing at the Swedish Open as the second seed. She was defeated in the second round by Lara Arruabarrena. Stosur then played at the Gastein Ladies as the second seed where she won her second title of 2015. Stosur defeated Sevastova, Koukalová, Schmiedlová and Karin Knapp in the final.

She began her clay-court season in Charleston, falling in the quarterfinals to Sara Errani in straight sets. Despite losing both rubbers in the World Group Play-offs in Brisbane to Christina McHale and CoCo Vandeweghe, Stosur was able to bounce back and reach the final in Prague, losing to Lucie Šafářová. She was then able to carry this form into Madrid, where she reached the semifinals, before losing to Simona Halep, winning only two games. She then won her opening match at the Rome Masters against Alison Riske, before losing to Kuznetsova in the second round. She then participated in the Internationaux de Strasbourg, where she won her first two matches in straight sets, before withdrawing from her quarterfinal match against Caroline Garcia, due to a wrist injury. At the French Open, Stosur beat Misaki Doi and Zhang Shuai in her opening two matches. She then beat 2015 finalist Lucie Šafářová to reach the fourth round in Paris for a fifth time. In a rain-delayed match stretched over three days, Stosur then came back from 5–3 down in the opening set to beat world No. 6, Simona Halep, 7–6, 6–3 to reach her first Grand Slam quarterfinal since the US Open and avenge her lost in Madrid. In her quarterfinal match against Tsvetana Pironkova, Stosur came back from a break down in both sets, recording a narrow 6–4, 7–6 win. Next she played world No. 4, Garbiñe Muguruza, in the semifinals, but lost in straight sets. Despite losing, Stosur reached her first Grand Slam semifinals since 2012 French Open, and will rise back to the top 15.

In the clay-court season, Stosur was eliminated in the first round of the Rome Masters by qualifier Yaroslava Shvedova, and was also defeated in her first match in doubles. She then competed at the Madrid Masters, where she upset tenth seed Agnieszka Radwańska in the first round, but fell to Anna Chakvetadze in the second. Stosur and Stubbs made it to the semifinals, but were defeated by the world-No.-1 team of Black and Huber. At the French Open, they fell in the third round to 16th seeds Yan Zi and Zheng Jie. In singles, Stosur defeated Francesca Schiavone in the first round and Yanina Wickmayer in the second. She then beat fourth seed Elena Dementieva in the third round and Virginie Razzano of France for a place in the quarterfinals, where she defeated Sorana Cîrstea and advanced to her first Grand Slam semifinal against seventh seed and eventual champion Svetlana Kuznetsova. After losing the first set, Stosur fought back a break of serve to win the second set in a tiebreak, but lost in the final set. This made her the lowest-ranked seed in the tournament to reach the furthest. With this result, Stosur cracked the top 20 for the first time in her career.

Her next tournament was the Toray Pan Pacific Open. As the eighth seed, Stosur had a bye in the first round. She played Francesca Schiavone in the second round, winning in a three-set battle. Stosur defeated 12th seed Dominika Cibulková in the third round in two sets. In the quarterfinals, she beat world No. 2 Maria Sharapova in straight sets, causing a huge upset—considering Stosur had only beaten Sharapova once in eleven matches. However, Stosur lost in the semifinals to former doubles partner and eventual champion Petrova in straight sets.

Stosur recovered to play in the Fed Cup World Group Play-offs against Switzerland. She played in both singles rubbers against Stefanie Vögele and Romina Oprandi, winning both matches in straight sets and ensuring that Australia play in the 2014 Fed Cup World Group. Following the Fed Cup victory, Stosur recorded two first-round losses at the Porsche Tennis Grand Prix in Stuttgart where she was the sixth seed against Jelena Janković. and at the Mutua Madrid Open where she was seeded ninth, to Carla Suárez Navarro. Following the disappointing loss in Madrid, Stosur moved on to the Italian Open and rebounded with her first win of the European clay season on her third attempt, comfortably defeating Hsieh Su-wei. She then won her second round match over Peng Shuai in straight sets. She then reached the quarterfinals in Rome with a three-set win over Petra Kvitová, the first time in Stosur's career she had beaten Kvitová. Stosur suffered her eighth straight loss to Victoria Azarenka in the quarterfinals losing in three sets.

Stosur started her 2014 season at the Hopman Cup partnering Bernard Tomic. Stosur lost to Agnieszka Radwańska, Eugenie Bouchard and Flavia Pennetta in all three of her singles matches and subsequently the Australian pair did not qualify for the final. Stosur then played at the Hobart International, opting not to play at the Apia International for the first time in five years. Stosur was the top-seed at the tournament. Stosur defeated Madison Brengle, Kristina Mladenovic and eighth seed Bojana Jovanovski en route to the semifinals, saving match point against Mladenovic. Stosur lost to Klára Zakopalová in the semifinals in straight sets. Stosur next played at the Australian Open. In the first round, Stosur played Klára Zakopalová, having played Zakopalová just three days prior; Stosur reversed the result winning in straight sets. In the second round, Stosur defeated Apia International champion Tsvetana Pironkova in straight sets. Stosur lost to 14th seed Ana Ivanovic in the third round despite being a set up. Ivanovic would then go on to make the quarterfinals, defeating world No. 1 Serena Williams in the following round. Stosur then headed to Hobart to compete in 2014 Fed Cup World Group. Stosur led Australia to a 4–0 victory against Russia. Stosur won the second and third singles rubbers in straight sets over Veronika Kudermetova and Victoria Kan.

Ten days before the 2014 Wimbledon, Stosur ended her coaching relationship with Maclagan, citing that she felt "change was needed". Stosur was defeated during the first round of Wimbledon 2014 by Yanina Wickmayer, losing in straight sets. But in mixed doubles she partnered with Nenad Zimonjić and won the title. En route to the final, they lost only one set in the third round and in the final they beat Chan Hao-ching and Max Mirnyi in two sets. Stosur then next travelled to Stanford where she was drawn against qualifier Naomi Osaka in the first round. The match was a tough battle but her opponent prevailed in the end. Stosur's next tournament was at the Rogers Cup. In the first round Stosur was drawn against yet another qualifier Monica Puig. She managed to defeat her opponent in straight sets. In the second round she was drawn against top-seed Serena Williams and lost in two sets.

Seeded 14th at the Western and Southern Open, Stosur received a first-round bye. In her opening match she lost against Czech Barbora Strýcová in two sets. Entering the US Open as the 16th seed, Stosur won her first round match against Italian Camila Giorgi in a three set thriller before losing to Zhang Shuai in straight sets in the second round.

Stosur competed with Zhang Shuai at the Australian Open. In the second round, they defeated eighth seed Hsieh Su-wei and Abigail Spears, and in the quarterfinals, they beat top seeds Barbora Krejčíková and Kateřina Siniaková. They advanced to the final, where they defeated second seeds and defending champions Kristina Mladenovic and Tímea Babos to win the championship. This was Stosur's first Grand Slam title since the 2014 Wimbledon mixed-doubles title and her first in women's doubles since the 2006 French Open.

Alongside Lleyton Hewitt, Stosur represented Australia at the Hopman Cup. The Australians were the top seeds. Their first tie was against Romania, where Stosur lost to Sorana Cîrstea in a three-setter, and then lost in the mixed doubles. The next tie was against the US, where Stosur beat Melanie Oudin in straight sets. Hewitt also won his singles match against John Isner, sealing the tie. In mixed doubles, Hewitt-Stosur lost. To advance to the final, Australia needed to win their tie against Spain 3–0. This result was, however, reversed, Australia losing to Spain 0–3. Stosur's last preparation tournament prior to the Australian Open was the Medibank International where she lost to Flavia Pennetta in the first round. Stosur was guaranteed a seeding of 13 for the Australian Open. She lost against world No. 1 and defending champion, Serena Williams, in two sets. Despite the loss, she moved up to a career-high ranking of No. 11. She played with Nadia Petrova in the doubles event of the Australian Open. They were seeded fifth, but lost to another Russia-Australian duo, Vera Dushevina and Anastasia Rodionova in the first round. She then travelled to Adelaide to represent Australia at the Fed Cup alongside Alicia Molik, Casey Dellacqua and Rennae Stubbs against Spain. Stosur won both of her singles matches by beating María José Martínez Sánchez and Anabel Medina Garrigues. Stosur and Stubbs also won their doubles match, gifting Australia a 3–2 win in the tie.

Stosur began her clay season at the Family Circle Cup, where she was seeded fourth. In the final, she defeated Zvonareva in straight sets, for her fifth consecutive victory over the Russian. With this, she won her second and biggest WTA title, which put her back inside the top ten at world No. 10. She is the only Australian woman to have won this title. Stosur competed in the World Group Play-offs in Ukraine. After the first day, the Aussies had a commanding lead, going 2–0 against Ukraine. This was helped by a win from Stosur against Mariya Koryttseva, and Anastasia Rodionova's win over Alona Bondarenko. Stosur then secured victory for Australia with a two-sets win over Lyudmyla Kichenok. Because of this, Australia played in the World Group in 2011 against the top-seed Italy. Stosur then competed at the Porsche Tennis Grand Prix in Stuttgart. Her 11-game winning streak was ended by former world No. 1, Justine Henin, in the final in three sets. Despite this result, Stosur reached a new career-high ranking of world No. 8.

Her next scheduled tournament was the Rome Masters; however, Stosur had to withdraw due to fatigue. With this, her next scheduled tournament was the Madrid Open. In the quarterfinals, Stosur was broken multiple times by Venus Williams, losing 3–6, 3–6. In doubles, Stosur resumed her partnership with Petrova as third seeds with a first-round bye. However, they were knocked out in the second round by Anastasia Rodionova and Patty Schnyder. Coming into the French Open Stosur was seeded seventh and was one of the favourites to win the title, due to her semifinal run in 2009 and her tour-best 14–2 record on clay in 2010. She was drawn in the same quarter as Henin, Maria Sharapova and Serena Williams, which was dubbed the toughest section of the draw. Becoming the first Australian woman to reach a Grand Slam singles final since Wendy Turnbull at the 1980 Australian Open, she was the favourite for the title, by dispatching three consecutive former world No. 1s and favorites for the title Henin, Serena Williams and Jelena Janković) but was upset by Francesca Schiavone in the final.

In doubles, Stosur and her partner Petrova were the fourth seeds. They defeated Irina Pavlovic and Laura Thorpe in the first round, and Vania King and Michaëlla Krajicek in the second round. Their run came to an end at the hands of Ukrainian sisters Alona Bondarenko and Kateryna Bondarenko, when the fourth seeds retired trailing 1–6, 0–1. At the Aegon International in Eastbourne, Stosur was defeated in the semifinal by eventual champion Ekaterina Makarova, despite leading the first set 3–0 and having a chance to serve for that set at 5–3. But with her semifinals appearance she attained a new career high of world No. 6; also, she was ranked No. 1 in the race to the WTA Championships in Doha. Her next tournament was the Wimbledon Championships. As the sixth seed, Stosur fell in the first round to Kaia Kanepi in straight sets, after saving three match points. As the French Open champion Schiavone also lost in the first round, Stosur and Schiavone were the first two women in history who reached the French Open final, but failed to win a match at Wimbledon. Despite not winning a match, she received a new career-high ranking of world No. 5, due to Dementieva's withdrawal from the tournament due to injury. Stosur also played in the doubles event, hoping to have success similar to the previous year with then-partner Stubbs. She played with her 2010 partner Petrova as the third seeds, but lost in the third round to eventual champions, Vania King and Yaroslava Shvedova. She also competed in the mixed doubles event as first seeds with Nenad Zimonjić. They received a bye in the first round, and in the second round, they defeated Colin Fleming and Sarah Borwell. They then faced the Belgium duo Xavier Malisse and Clijsters, but lost in two sets.

Stosur then attempted to defend her title at the HP Open as the top-seed, her only International tournament of the year. She lost against Kimiko Date-Krumm in the quarterfinals in a final-set tie-break, becoming the first top-ten player in WTA history to lose to an opponent over the age of 40. Stosur competed at the WTA Championships, where she was seeded fifth. Stosur was drawn in the Maroon Group alongside world No. 1 Caroline Wozniacki, world No. 6 Francesca Schiavone and world No. 9 Elena Dementieva, seeded first, fourth and seventh, respectively, due to the Williams sisters' withdrawal. In her first match against Schiavone, she avenged her Roland Garros final loss to the Italian by defeating her in straight sets, coming back from a 0–4 deficit in the first set. Her next opponent was world No. 1 Wozniacki. Stosur continued her dominant showing, recording a straight-sets win to secure her spot in the semifinals. She then fell to Elena Dementieva, but secured her spot in the semifinals by winning one set. Stosur finished in first position in her round-robin group, but lost to three-time US Open champion and world No. 4 Clijsters in the semifinals. Stosur ended her year at world No. 6. In addition, she was the only player in 2010 to defeat both current world No. 1 players, Serena Williams and Wozniacki. She also had the best percentage of points scored on second serve amongst her peers.

Stosur then competed at the Qatar Open in Doha. She was seeded third and avenged her loss in the first round of the Australian Open by defeating Sorana Cîrstea in the second round; she eventually lost in the final to current world No. 1, Victoria Azarenka, who had not lost a match (17–0) to that point in 2012. Her second Middle-East tournament was the Dubai Tennis Championships, where she defeated Lucie Šafářová in the second round in three sets, but for the second straight year she lost to former world No. 1, Jelena Janković. Stosur then traveled to the United States to compete in the BNP Paribas Open, where she defeated young American Irina Falconi, to make the third round, where she lost a very tough match to Nadia Petrova. Then at the Miami Open, Stosur made the quarterfinals after a big comeback from a set and 2–5 down to defeat Chanelle Scheepers. Serena Williams got revenge on Stosur for the 2011 US Open final by defeating her in straight sets.

She started her year at the Brisbane International where she was seeded seventh. Before the tournament started, Stosur admitted that she had only ten days of practice on court since surgery to remove a spur from her left ankle. This was just six weeks prior to the first-round match. Stosur lost in the first round to Sofia Arvidsson where she committed 48 unforced errors. Stosur played Zheng Jie in the first round at the Apia International Sydney, where she was seeded sixth. She lost in a tight three-set battle. It was Stosur's fifth consecutive loss in Australia; however, she broke a nine-set losing streak in the country by winning the second set. At the Australian Open, where she was seeded ninth, Stosur broke her Australian hoodoo, by defeating Chang Kai-chen in the first round in a straight sets win. However, she lost in the second round to Zheng Jie for the second straight tournament despite being up 5–2 up in the third set.

At the US Open, the 11th-seeded Stosur was stunned by the 296th-ranked American qualifier Victoria Duval in the first round going down in three sets. The loss meant, Stosur would drop out of the top 15 in the world rankings, and also meant that in 2013 she failed to reach the fourth round in any Grand Slam tournament.

Stosur then competed at the Qatar Open where she was seeded 12th. She won her first round over Marina Erakovic in straight sets. She lost to Jana Čepelová in the second round. Stosur then lost in the first round of the Dubai Championships against qualifier Annika Beck in three sets. Stosur then competed at the BNP Paribas Open where after receiving a first-round bye, she defeated Francesca Schiavone in straight sets. However, she lost to Flavia Pennetta in the third round. This was Stosur's fifth WTA singles loss to Pennetta in her career. She dropped to world No. 20 after the tournament. Stosur was the 16th seed at the Miami Masters where she received a first-round bye. She then defeated qualifier Kiki Bertens in straight sets but lost to Vandeweghe in the next round. At the Mutua Madrid Open she lost to the eventual champion Maria Sharapova in straight sets. At the Rome Masters, Stosur for first time lost to Li Na in straight sets managing to win only four games in the full match and allowing Li Na to pass to quarterfinals very comfortably. At the French Open, Stosur was leading by one set and 4–3 in the second one but lost the control of the match and went on to lose all the games there after against the eventual champion Maria Sharapova.

Stosur began her US Open series campaign at the Citi Open in Washington, D.C. as the top-seed. She made the quarterfinals with wins over Russian qualifier Alla Kudryavtseva and Caroline Wozniacki after Wozniacki retired in the second set due to a back injury before losing to eventual semifinalist American wildcard Jessica Pegula in straight sets. She then competed at the Rogers Cup as the 13th seed, defeating Heather Watson in the first round before losing to Daria Kasatkina in the second round.

At the Summer Olympics in Rio, Stosur made it to the third round as the 13th seed, with wins over Latvian teen Jeļena Ostapenko and Japan's Misaki Doi before bowing out to second seed and eventual silver medallist Angelique Kerber of Germany. Partnering with Daria Gavrilova in the women's doubles, the duo lost to fifth seeded Swiss pairing of Timea Bacsinszky and Martina Hingis the eventual silver medallist in opening round. In mixed-doubles, Stosur paired up with John Peers and lost to the fourth seeds from India Sania Mirza and Rohan Bopanna in the first round.

Currently, Williams leads 8–3 in head-to-head matches. Their first match occurred during the 2008 Beijing Olympics in the second round when Williams was ranked world No. 4, with Williams winning 6–2, 6–0. But it is Stosur who has won their most important match, the 2011 US Open final; she prevailed 6–2, 6–3 though Williams went into the match as the clear favorite. That match had its share of controversy when Williams was docked a point for violating the hindrance rule. Williams avenged the defeat at the 2012 Miami Masters, 7–5, 6–3. They next met a week later at the 2012 Family Circle Cup, where Williams again defeated Stosur 6–1, 6–1.

Currently, Stosur leads 9–4 in head-to-head matches. Their important matches include the 2009 final of HP Open in Osaka, where Stosur lifted her first WTA singles title, and the 2010 French Open final. It was both players' first ever Grand Slam final, with Schiavone coming out on top.

Currently, Stosur leads 8–2 in their head-to-head matches. In their first two meetings, Zvonareva won both of those matches. After that, Stosur has won the following eight matches, including the 2010 Family Circle Cup final and the 2011 US Open quarterfinal match.

Maria Sharapova leads 15–2 in their head-to-head matches. Sharapova won their first nine meetings, prevailing in straight sets at their most recent meeting at the French Open, 2015. Sharapova retired in 2020.

Stosur leads 6–1 in head-to-head matches. Stosur won the first six meetings, five of them being in straight sets, including an overwhelming 6–1, 6–0 victory against Li Na at the WTA Championships in 2011. Li Na then retired in 2014.

Šafářová leads their head-to-head 11–4. Their first meeting was in Charleston, when Šafářová won 5–7, 6–1, 6–4. After next two Šafářová's wins, Stosur won their fourth match in Miami and then again in Dubai. After that Šafářová won two times in two tie-breaks, in Montreal and in Ostrava during 2013 Fed Cup competition. Šafářová beat Stosur even three-times in 2013, in Eastbourne, Tokyo in the third round and following week in Beijing in the first round. In 2014 they met in Charleston third round, where Šafářová won again, but in 2015 Stosur won in Sydney in three sets, but Šafářová got revenge in Doha. They met again in 2016 in the final in Prague, which Šafářová won in three sets. Stosur then beat her at the 2016 French Open in three sets.

Stosur lost her second-round match against Arantxa Rus at Wimbledon. In the London 2012 Olympics, Stosur lost in the first round to Carla Suárez Navarro. Stosur won the first set but lost the second and then the third set 8–10. Stosur played mixed doubles with former world No. 1, Lleyton Hewitt. They reached the quarterfinals together, but lost to crowd favorites Andy Murray and Laura Robson, who were competing for Great Britain.

At the French Open, Stosur won her opening match against Kimiko Date-Krumm after waiting 2½ hours to play because of rain. She then quickly won the opening first nine games and smashed 42-year-old Date-Krumm in two sets. Stosur then defeated Kristina Mladenovic in straight sets. Stosur then played 18th seed Jelena Janković in the third round. After winning the first set, Stosur lost the match in a tight battle. She was unable to defend her semifinal ranking points of 2012, and slipped out of the world's top 10. At Wimbledon, she reached the third round for only the second time in her career after defeating lucky loser Anna Karolína Schmiedlová and Olga Puchkova both in straight sets. In the third round she lost to eventual finalist Sabine Lisicki in three sets. Stosur was stunned in the second round of the Bank of the West Classic in Stanford by Olga Govortsova. She accepted a last-minute wildcard into the Southern California Open in Carlsbad where she opened with a win over Varvara Lepchenko. She then made her way through to the final defeating Sesil Karatantcheva in the second round, causing an upset to defeat Agnieszka Radwańska in the quarterfinals and recovering from 0–4 in the first set to defeat Virginie Razzano in the semifinals. Stosur went on to play Victoria Azarenka in the final. She previously had an 0–8 record against Azarenka. Stosur stunned Azarenka by cruising past her in straight sets. This was Stosur's first WTA title since her win at the US Open.

Stosur then started her hard-court season in Washington where she reached the semifinals after defeating Mladenovic, Falconi and Niculescu before losing to eventual champion Sloane Stephens. Stosur then lost in the first round to Daria Gavrilova at the Rogers Cup. Following this, she again lost in the first round but this time to Tímea Babos at the Western & Southern Open. Stosur then played at the US Open and reached the fourth round at the US Open for the first time since 2012. In the first round she got revenge on Tímea Babos, to whom she lost the previous week. She backed this up with wins over Evgeniya Rodina and 16th-seeded Sara Errani. She then lost to eventual champion Flavia Pennetta.

Stosur won the 2011 US Open, defeating Serena Williams in the final and becoming the first Australian woman since Evonne Goolagong Cawley in 1980 to win a Grand Slam singles tournament. She has also won six other Grand Slam titles to date: the 2005 US Open, 2006 French Open, and 2019 Australian Open women's doubles events, and the 2005 Australian Open, 2008 Wimbledon Championships and 2014 Wimbledon Championships mixed doubles events. In addition, she finished runner-up at six other Grand Slam tournaments, including the singles at the 2010 French Open, where she defeated four-time champion Justine Henin, ending her 24-match winning streak at the tournament, and world No. 1 Serena Williams en route to the final.

Stosur suffered two second-round losses at the Toray Pan Pacific Open and the China Open, both to Maria Kirilenko. However, on 9 October 2011 it was announced that Stosur had qualified for the year-ending WTA Championships in Istanbul. Stosur was runner-up at the HP Open where she was defeated by second seed Marion Bartoli in the final. Along the way she defeated Noppawan Lertcheewakarn, Misaki Doi, seventh seed Chanelle Scheepers and Zheng Jie. Stosur was placed in the white group for the Tour Championships. Her first match was against second seed Sharapova, winning the match in two sets. In this match, not only did Stosur cause an upset against the second seed, she won her first match against the Russian after losing to Sharapova in their previous nine encounters. In addition, Stosur has won six of her last seven matches against current top-2 players. (The only loss against a current top-2 player at that time was against world No. 1 Serena Williams, in the 2010 Australian Open.) In Stosur's second round-robin match, she lost to fourth seed Victoria Azarenka. This was her fifth loss against Azarenka and has yet to win a single set from Azarenka. Stosur beat fifth seed Li Na for the loss of one game in her final round-robin match to advance to the semifinals for the second straight year, where she met maroon group winner Petra Kvitová for a spot in the final. She lost the match in three sets, despite being 7–5, 1–0 up with a breakpoint to go 2–0. Despite the loss, this was the first time Stosur won a set against Kvitová. Kvitová went on to defeat Azarenka in the final, making it the second consecutive year that Stosur lost to the eventual champion in the semifinals. Because of her performance at the WTA Championships, Stosur replaced Vera Zvonareva as the world No. 6, and finished the season ranked No. 6 for the second straight year.

At the Family Circle Cup in Charleston, Stosur entered the tournament as second seed and had a first-round bye. She defeated wildcard Jamie Hampton in the second round and Galina Voskoboeva in the third round. In the quarterfinals, Stosur defeated Venus Williams for the first time after losing to her in the previous four encounters. However, Stosur's run ended in the semifinals, where she lost to eventual champion Serena Williams. After this, Stosur made her way to Stuttgart, where she won both her singles matches against Germany in the World Group Play-offs. She defeated two top-20 players, Angelique Kerber, the same player who Stosur faced in the 2011 US Open semifinal, and Andrea Petkovic, for their first encounter. At the Porsche Tennis Grand Prix, Stosur reached the quarterfinals by defeating the defending champion Julia Görges in three sets. She lost in the quarterfinals to Maria Sharapova, despite holding a match point in the second set. She next played at the Madrid Open, defeated Petra Martić in a third set tiebreak and Christina McHale in the first two rounds on the blue clay courts. Stosur's third-round opponent was Petra Cetkovská. Stosur won the match in straight sets to reach the quarterfinals, where she lost a tight match to Lucie Hradecká in two tiebreaks. Her final tournament before the French Open was the Italian Open, where she defeated Sara Errani to make the third round, where she lost to Venus Williams.

The only time they didn't play a complete match was at the 2011 Western and Southern Group Open in the second round where Williams withdrew from the match due to a toe injury.

Stosur's next scheduled tournament was the Bank of the West Classic in Stanford, where she was the top-seed, but lost in a semifinal match-up with Victoria Azarenka. She then participated in the Mercury Insurance Open in San Diego. As the second seed, she lost in the quarterfinals to Pennetta. Due to a shoulder injury, she withdrew from the Cincinnati Masters and the Rogers Cup in Montreal. This meant that Stosur had only taken part in one of the five Premier-5 tournaments of the year. After taking time off to recover from her injury, she took part in the Pilot Pen Tennis tournament at New Haven, in hopes of regaining some of the lost ranking points and in preparation for the US Open. Stosur lost to Petrova in the quarterfinals. At the US Open, Stosur was seeded fifth. In her first US Open quarterfinal, she was up a break in the third set, before falling to defending champion and second seed Clijsters in three sets. Stosur announced that she would not take part in the 2010 Commonwealth Games. Instead, she competed at the final Premier Mandatory event of the year, the China Open, where she lost in the first round to qualifier Anastasija Sevastova in three sets. Stosur qualified in singles for the year-ending WTA Championships in Doha for the first time in her career, following the withdrawal of Venus Williams.

At the Western & Southern Open in Cincinnati, Stosur entered the tournament as the third seed. Stosur had a bye in the first round, and she played Anabel Medina Garrigues in the second round winning in three sets. She played Ekaterina Makarova in the second round, comfortably prevailing in two sets. In the quarterfinals, Stosur played wildcard and former world No. 1 Venus Williams, who won in three sets. Defending a Grand Slam title for the first time, Stosur comfortably made it through the first three rounds at the US Open against Petra Martić, Edina Gallovits-Hall, and 31st seed Varvara Lepchenko. Stosur only lost 13 games in the first three rounds. She was then up against rising star Laura Robson. Robson had defeated Kim Clijsters and Li Na en route to the fourth round. Stosur comfortably defeated Robson in straight sets but lost in the quarterfinals to world No. 1 Victoria Azarenka in a thrilling three-set showdown, which is regarded as the match of the championships. She succumbed seven points to five in the final-set tiebreaker and was two points away from clinching victory. It was the first time Stosur had ever taken a set of Azarenka. Despite not defending the title, Stosur did win the inaugural US Open Sportsmanship Award.

At the MPS Group Championships in Ponte Vedra Beach, Stosur was eliminated in the first round by second seed and eventual champion, Caroline Wozniacki. She then played for the Australian Fed Cup team in Mildura. Australia against Switzerland in their World Group II playoff. Stosur won the opening rubber of the tie in straight sets, then sealed the victory for Australia in the third rubber with a tight three-set victory, improving her 2009 Fed Cup singles record to 6–0. With this result, the Australian team advanced to the World Group II in 2010.

Both players have held match points against the other in matches that they have gone on to lose. Examples include Stosur having four match points at the 2009 Medibank International, but eventually losing. Another example was the 2010 French Open where Williams had a match point, but Stosur won.

Stosur has had several coaches through the years. David Taylor coached her from 2008 to 2013 and 2015 to 2016, and Miles Maclagan was her coach in 2013 and 2014. Others include Simon Rea (2014–2015) and Joshua Eagle (2017–2018). In November 2018 Stosur began working with Nick Watkins.

After the French Open, Stosur started showing symptoms of what was months later diagnosed as Lyme disease, an infection transmitted by the bite of ticks. By then, her form had slumped. She lost in the second round at Wimbledon, withdrew from many tournaments on the American hard-court circuit, and lost in the first round of the US Open, where she was seeded 29th, to No.-96-rated Alizé Cornet of France. Stosur did not play in any more tournaments in 2007.

In 2006, she represented Australia alongside Todd Reid at the Hopman Cup, winning all of her singles matches. She then lost in the first round in Medibank International to Nicole Vaidišová in three sets. At the Australian Open, Stosur made it to the fourth round in singles, falling to Martina Hingis. She and Lisa Raymond also made it to the doubles final, where they were defeated by Chinese duo Yan Zi and Zheng Jie.

In 2004, Stosur reached the semifinals of the Gold Coast event, before falling to Ai Sugiyama. She reached the second round of the Moorilla Hobart International, then the second round of the Australian Open, and later qualified for WTA events in Acapulco, Indian Wells, Vienna and Birmingham. Stosur competed at the Athens Olympics, where she lost in the first round. She continued to play WTA events, qualifying for the Japan Open and Bali in the autumn of 2004. At the end of the 2004 season, she reached the doubles final in Québec City, partnered with Els Callens from Belgium.

In 2003, Stosur won her first WTA singles matches, reaching the third round of the Australian Open. She lost in the third round to No. 7 seed Daniela Hantuchová. She also qualified for the WTA event in Memphis.

Her next tournament was the Dubai Tennis Championships, where she was seeded ninth. Stosur was defeated in the opening round, at the hands of veteran Tathiana Garbin. She had better success in the doubles partnering Petrova. The pair was seeded fourth and reached the semifinals after receiving a first-round bye, then a walkover, and a win against fifth seeds Alisa Kleybanova and Francesca Schiavone. Seeded 8th at the BNP Paribas Open, Stosur received a first-round bye. In the quarterfinals, she defeated 12th seed and defending champion Vera Zvonareva, to move through to her first semifinal at the tournament, where she lost to eventual champion Jelena Janković in straight sets, with Stosur making 47 unforced errors in the match. With her success, she reached a career-high ranking of No. 10, making her only the third Australian woman to achieve this feat in ten years, after Jelena Dokić reached No. 4 in 2002 and Alicia Molik reached No. 8 in 2005. In doubles, Stosur was third seed with Petrova. They had a comfortable route to the final, dropping only one set, where they lost to Květa Peschke and Katarina Srebotnik. Stosur's next tournament was the Miami Masters, where she was seeded ninth which allowed her a bye in the first round. She lost in the quarterfinals to eventual champion Kim Clijsters. In the doubles draw, Stosur and Petrova were seeded third and reached the final without dropping a set. However, Stosur and Petrova were defeated in the second straight final, losing in a super-tiebreak 7–10 to Gisela Dulko and Pennetta.

At the age of 14, Stosur joined the Queensland Academy of Sport (QAS) under Geoff Masters. In 2001, when she was 16, she joined the Australian Institute of Sport tennis program.

Stosur first played professional tennis in 1999 on the ITF Women's Circuit. In 2000, she debuted at the Australian Open losing in the first qualifying round. In the following year, she won four straight ITF titles. In 2002, she lost in the first round at the Gold Coast event.

Samantha Jane Stosur (/ˈ s t oʊ s ər / STOH -sər; born 30 March 1984) is an Australian professional tennis player. She is a former world No. 1 in doubles, a ranking which she held for 61 weeks, and a former world No. 4 in singles. She was also the top-ranked Australian singles player for 452 consecutive weeks, from October 2008 to June 2017. She has won a combined total of 38 titles on the WTA Tour: nine in singles, 26 in doubles and three in mixed doubles, as well as amassing over $19 million in prize money.

She then left to the United States where she played at the Indian Wells tournament. After a bye in the first round, she defeated young wild card Madison Keys. Stosur then struggled past 32nd seed Peng Shuai in three sets. into the fourth round where she recovered from a set down to defeat 24th seed Mona Barthel. In the final game of the fourth round, she injured her right calf and was forced to forfeit the quarterfinal match against Angelique Kerber. The injury forced Stosur to pull out of the Miami Masters tournament. She successfully returned to the court at the Family Circle Cup where she opened her campaign in the second round with a straight-sets win over Marina Erakovic. During her third-round match, Stosur was forced to retire with her recurring calf injury against qualifier Eugenie Bouchard.

Stosur was seeded fifth at the Australian Open, where she lost in the third round to 25th seed Petra Kvitová. Stosur then rose to a new career high No. 4, following a quarterfinal showing at the Dubai Tennis Championships. She had a disappointing start to the first American leg of the year, falling in the third round of the Indian Wells to Dinara Safina. In Miami, she was seeded fourth, but was defeated in straight sets in the fourth round by 16th seed and former No. 1, Maria Sharapova. After Miami, Stosur played at Charleston, where she failed to defend her title, falling in the third round to Elena Vesnina in two sets.