Sirimongkol Singmanasak (; born 2 March 1977) is a Thai professional boxer, bare-knuckle boxer and kickboxer. He is a world champion in two weight classes, having held the WBC bantamweight title in 1997 and the WBC super-featherweight title from 2002 to 2003. His other names were Sirimongkol Nakhon Thong Park View (ศิริมงคล นครทองปาร์ควิว), Sirimongkol Singwancha (ศิริมงคล สิงห์วังชา), Sirimongkol Nakornloung (ศิริมงคล นครหลวงโปรโมชั่น), and Sirimongkhon Iamthuam (ศิริมงคล เอี่ยมท้วม). Biography and boxing career He was born into a family whose father owned the "Singmanasak Boxing Gym" (ค่ายมวยสิงห์มนัสศักดิ์). His older brother used to compete in Muay Thai under the ring name "Manopchai Singmanasak" (มานพชัย สิงห์มนัสศักดิ์) and his younger sister was once a female Muay Thai kickboxer. During his childhood, Sirimongkol enjoyed performing in the Thai folk theatre form Likay (ลิเก; Thai traditional dance), which involved both singing and dancing. Under concerns that he would become a Katoey (กะเทย; Thai transgender), Sirimongkol's father forced him to take up boxing, which he initially disliked. He began competing in the amateur boxing tournament in highschool division before turning pro. He won the WBU Super flyweight and Bantamweight titles in 1995. In August 1996, he became the WBC Bantamweight Champion, by challenging interim champion José Luis Bueno of Mexico at Phitsanulok Provincial Stadium, Phitsanulok province. At the age of 19, he scored a fifth-round knockout in impressive fashion. He had qualified for the title shot with a victory over Thanomsak Sithbaobay aka Khaoyai Maha Sarakham (ถนอมศักดิ์ ศิษย์โบ๊เบ๊, เขาใหญ่ มหาสารคาม), an elder Thai boxer who had unsuccessfully challenged for the world championship three times. He defended the WBC bantamweight title three times before losing the title to former Japanese world champion Joichiro Tatsuyoshi in November 1997 at Osaka-jō Hall in Osaka, Japan. 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 second round. He held the title for one year before he lost to Jesús Chávez. In 2009, he was arrested for possession of Ya ba (ยาบ้า; tablets of methamphetamine and caffeine popular in Thailand). While incarcerated in prison, he was responsible for teaching boxing to other inmates. During this time he still boxed and won the WBC Asia Intercontinental Welterweight title. He was pardoned 4 years into his 20-year sentence. In 2017, he would suffer his first defeat in 14 years to Uzbek boxer Azizbek Abdugofurov. Bare-knuckle boxing Sirimongkol