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Jon Jones' Toughest Fights

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Jon Jones

Photograph By Ed Mulholland for ESPN.com

Former light heavyweight champ Vitor Belfort openly expresses the core of his excitement over fighting Jon Jones on Sept. 22, calling the 205-pound champion the best mixed martial artist ever. It's easy to figure out how Belfort reached his conclusion: Jones' dominance during his five most recent bouts is arguably the most impressive run of any fighter in combat sports history. All five opponents were contenders, four were ex-light heavyweight champions, and only one went the distance. Jones is the best mixed martial artist ever? Belfort might be right. -- Franklin McNeil