Thomas Kahlenberg

On 5 March 2020, Kahlenberg tested positive for SARS-CoV-2 during the current pandemic of the disease, after having been infected at a birthday party in Amsterdam. This forced Brøndby, Lyngby and Ajax to place some of their players and coaches, who had recently met with Kahlenberg, into quarantine. Kahlenberg described his symptoms as similar to a flu and he was placed in home quarantine. Peter Madsen, another retired Danish football player who attended the same Amsterdam birthday party as Kahlenberg, also tested positive for the virus. On 12 March, Kahlenberg was declared fully recovered.

On 21 August 2013, Kahlenberg signed a four-year contract with his former club Brøndby. On 28 May 2017, he announced his retirement.

In January transfer window in 2012, it announced that Kahlenberg has returned to Ligue 1, but joined Evian on loan, until the end of the 2011–12 season. Upon moving to the club, Kahlenberg would be joined by compatriots Daniel Wass, Stephan Andersen and Christian Poulsen and was also given the eleven number shirt. Kahlenberg had been linked a move to Saint-Étienne.

He made his debut for the club, on 14 January 2012, coming on as a substitute for Cédric Barbosa in the 61st minutes, in a 3–1 loss against Dijon. On 17 March 2012, Kahlenberg scored his first goal for the club, in a 2–0 win over against his former club. After the match, Kahlenberg is expected to join Evian on a permanent deal at the end of the season. Two months later, after his first goal, on 1 May 2012, he scored his second goal for the club, in a 2–2 draw against Montpellier. In an interview with the Sporten, Kahlenberg says if he never moved to Evian, then he would dead and buried.

At the start of the 2011–12 season, Magath placed Kahlenberg in the club's reserve. In November, Magath announced that Kahlenberg, along with Patrick Helmes, would not be needed at the club

The next season, Kahlenberg was featured more often in the first team, under new manager Steve McClaren, but soon get left out of the first team. On 2 October 2010, Kahlenberg soon scored his first goal for the club, in a 1–1 draw against Borussia Mönchengladbach. However, Wolfsburg would slipped into the table, leading McClaren. McClaren's successor Felix Magath took over and would leave him out of the first team. In mid-February, Kahlenberg, along with Alexander Madlung, was suspended by interim manager Pierre Littbarski, citing lack of focus and also lack of commitment. A month after his suspension, Kahlenberg went on trial with English Premier League side Blackburn Rovers

After a lay-off from the senior national team, Kahlenberg was recalled for the 2010 World Cup qualifiers. In his second start of the qualifiers, he scored the winning goal against rivals Sweden, which helped Denmark qualify for the main tournament.

In May 2009, Kahlenberg signed a four-year contract with the defending German champions Wolfsburg for a €4 million transfer fee, effective from the end of the season. Immediately after joining Wolfsburg, Kahlenberg suffered an hip injury which kept him out until October 2009. He made his Bundesliga debut for Wolfsburg in the 3–3 draw with Mainz on 31 October. However, in his first season, Kahlenberg struggled to make his progress into the first team at Wolfsburg, having failed to make an impact. At the end of the season, Kahlenberg, along with Karim Ziani, was informed by the club that they are no longer needed.

In August 2009, Kahlenberg married Anne Zeuthen Jensen. They have three children, daughters Karla and Alma and son, Max.

Kahlenberg continued to play for the Denmark under-21 team until May 2006, when he was selected for the Danish squad for the 2006 European Under-21 Championship. As age restrictions are calculated from the start of the qualification matches, in September 2006, he competed in the tournament at age 23. Even though Denmark was eliminated in the preliminary group stage, Kahlenberg managed to score three goals in three games, and he was selected for the "Team of the Tournament". He ended his under-21 national team career after the tournament, having scored 10 goals in 26 matches for the Denmark under-21s.

In July 2005, the French club Auxerre made a transfer fee offer of £2.5 million for Kahlenberg, which Brøndby accepted. Kahlenberg signed a four-year contract with Auxerre in the top-flight Ligue 1 championship. After the move, Kahlenberg says he is looking forward to play in Ligue 1. Kahlenberg made the most assists of all players in the 2005–06 championship season. In his four seasons at Auxerre, Kahlenberg played 130 games and scored 19 goals in the Ligue 1.

During his first years at Brøndby, Kahlenberg played in the central midfield, where he set up the attacks with his great technique and view for the game. In the 2004–05 season, Kahlenberg was moved out as left midfielder, following the sale of Swedish international left winger Mattias Jonson. Cutting into the field from his wide position, Kahlenberg managed to become Brøndby's 2004–05 league top goalscorer with 13 goals, leading the club in winning The Double. Kahlenberg played a combined total of 130 games for Brøndby IF, including 97 games and 28 goals in the Danish Superliga championship. Since leaving Brøndby, the club would suffered a set-back when they find themselves in relegation threatening and economic problems. Kahlenberg expressed sadness and sympathy of the club of what they been through.

While playing youth football at Brøndby IF, Kahlenberg played a number of games for various Danish youth national teams on under-17 and under-19 levels from August 1999 to February 2002. He was recognized as one of the most talented Danish midfielders, and debuted for the Denmark under-21 national team in September 2002. He debuted for the Danish senior national team under coach Morten Olsen on 30 April 2003 in a 1–0 friendly win against Ukraine. He was selected as the youngest Danish player for the 2004 European Championship, but did not play any games at the tournament. He subsequently won the 2004 Danish under-21 Player of the Year award.

Kahlenberg did not make his senior debut for Brøndby, until youth team coach Tom Køhlert was promoted to head coach in May 2002. On 12 May 2002, Kahlenberg made his Superliga debut against arch-rivals København, at the penultimate match of the 2001–02 season. The result was a 1–1 draw, which helped Brøndby secure the 2001–02 Danish championship on goal difference.

Thomas Zeuthen Kahlenberg (Danish pronunciation: [ˈkʰɑˀln̩ˌpɛɐ̯ˀ] ; born 20 March 1983) is a former Danish footballer. He started his career with Brøndby IF, winning two Danish Superliga championship, and played four seasons at French club Auxerre. He has played 46 games and scored 5 goals for the Danish national team, and represented Denmark at the 2004 European Championship, 2010 FIFA World Cup and 2012 European Championship. He was named 2004 Danish under-21 Player of the Year.