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In this episode of Heroes we track Conor McGregor's unprecedented rise from plumber's apprentice to the biggest MMA celebrity in the history of the sport, we follow Xiong Jingnan, the first Chinese MMA champion in the world who competes to honour the memory of her grandparents and take a look at how Holly Holm became the only person to hold championship titles in both boxing and MMA. Language: ENG

 Read more Read less Duration: 26 min