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As a teenager Chatri Sityodtong's family lost all its money in Thailand. But Chatri won a place at Harvard University, and took his homeless Mum to live with him in his dorm room. He set out on a business career that has seen him sell his Silicon Valley start-up company for millions. Now aged 45, his latest venture is a mixed martial arts tournament, televised across Asia, called the 'One Championship'. It may seem like a surprising move to make, but Chatri has always been a martial arts nut - especially devoted to the discipline of Muay Thai. (Picture credit: ONE Championship.)