{{Infobox martial artist |native_name = ชาตรี ศิษย์ยอดธง | image = Chatri Sityodtong in Singapore.png | image_size = | alt = | caption = | birth_name = Chatri Trisiripisal | birth_date = | birth_place = Thailand | death_date = | death_place = | death_cause = | residence = | citizenship = | nationality = | height = | weight_lb = 170 | weight_class = | reach = | style = Muay Thai, Brazilian Jiu-Jitsu | stance = | fighting_out_of = | team = | rank = Kru in Muay Thai Brown belt in Brazilian Jiu-Jitsu under Renzo Gracie| years_active = | mma_kowin = | mma_subwin = | mma_decwin = | mma_dqwin = | mma_koloss = | mma_subloss = | mma_decloss = | mma_draw = | mma_nc = | university = Tufts University (BA)Harvard Business School (MBA) | website = | sherdog = | footnotes = | updated =}} Chatri Trisiripisal (, ), known by the ring names Chatri Sityodtong (, ) and Yodchatri Sityodtong (, ), is a Thai entrepreneur and martial arts instructor based in Singapore. He is best known for being the founder, chairman, and chief executive officer of Singapore-based combat sports promotion ONE Championship. He is also the star of The Apprentice: ONE Championship Edition.Personal life In 1971, Sityodtong was born to a Thai father and Japanese mother and was raised in Thailand. He graduated with a B.A. in Economics from Tufts University in 1994. His family went bankrupt during the Asian Financial Crisis and his father eventually abandoned the family, but Sityodtong went on to obtain an MBA from Harvard Business School in 1999. Sityodtong emigrated to Singapore in the mid-2000s, and has lived there ever since. Sityodtong supports Global Poverty Project through his companies. He is an active donor to Boys' Town Home, a charity that serves abandoned children and youth in need. Sityodtong also supports the Singapore Children's Society and children with cancer with Children's Cancer Foundation. Martial arts background Chatri started Muay Thai as a child under Kru Yodtong Senanan of Sityodtong Camp in Pattaya, Thailand. Senanan eventually gave Chatri the ring name Yodchatri Sityodtong. A veteran of over 30 fights, Sityodtong's last professional Muay Thai fight was in 2008 in Thailand. He is a certified senior Muay Thai instructor under Senanan. Before his death, Senanan appointed him as one of 4 conservators of Sityodtong Muay Thai in the world. Sityodtong started training in