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The 9 greatest undefeated boxers in history ...
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From Floyd Mayweather to Tyson Fury and Oleksandr Usyk – ranking boxing's greatest undefeated fighters ever | talkSPORT
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Boxing rankings: The Independent's pound-for-pound fighters list | The Independent
Boxing's top 25 under 25 - Meet the stars of the future - ESPN
Local boxer David Stevens is on the rise as an undefeated super middleweight
