Sirimongkol Singwancha

In 2017, he would suffer his first defeat in 14 years to Uzbek boxer Azizbek Abdugofurov.

In 2009, he was arrested for possession of Ya ba (ยาบ้า; tablets of methamphetamine and caffeine popular in Thailand). Once incarcerated in prison, he was responsible for teaching boxing to other prisoners. During this time he still boxed and won the WBC Welterweight Asia intercontinental title. He was pardoned 4 years into his 20-year sentence.

In 2005, he was scandalized by nude photo. Police officers have detected a pornographic book sold at Or Tor Kor Market near Chatuchak Weekend Market.

Sirimongkol then put together another impressive winning streak and won the vacant WBC Super featherweight title when he defeated Kengo Nagashima on August 24, 2002 by knockout in round 2. He held the title for one year before he lost to Jesús Chávez.

He defended at all 3 times before losing the title to Japanese boxer Joichiro Tatsuyoshi in November 1997 at Osaka-jō Hall, Osaka, Japan. Due to his weight loss until the body is pale.

He started the amateur boxing tournament in highschool division before turn pro to professional boxing career. He won the WBU Super flyweight and Bantamweight in 1995. In August 1996, he was promoted to the major institution WBC Bantamweight, by the vacated interim champion with José Luis Bueno a Mexican boxer at Phitsanulok Provincial Stadium, Phitsanulok province. He was the knockout in round 5 by impressively, even he is only 19 years old. Before that, he won the qualifies with Thanomsak Sithbaobay or Khaoyai Maha Sarakham (ถนอมศักดิ์ ศิษย์โบ๊เบ๊, เขาใหญ่ มหาสารคาม), the elder Thai boxer who had challenged the world champion 3 times but was unsuccessful.

Sirimongkol Singwancha (Thai: ศิริมงคล สิงห์วังชา ; born March 2, 1977) is a Thai professional boxer and kickboxer fighting out of Nakhon Ratchasima, Thailand. He has won world titles in two weight divisions. His career record is 91–3 (57 KOs). His other names were Sirimongkol Singmanasak (ศิริมงคล สิงห์มนัสศักดิ์), Sirimongkol Nakhon Thong Park View (ศิริมงคล นครทองปาร์ควิว) and Sirimongkhon Iamthuam (ศิริมงคล เอี่ยมท้วม).