George Groves has warned Badou Jack he will be making a mistake if the Swedish-born boxer relies on him tiring during their WBC super middleweight title fight.
Groves fights Jack at the MGM Grand in Las Vegas on September 12, on the undercard of Floyd Mayweather's welterweight fight with Andre Berto, amid ongoing concerns about his stamina.
The super middleweight's endurance his been a concern on more than one occasion, not least during his two defeats by Carl Froch, but he has spent the past eight weeks training in the mountains at altitude at Big Bear, California, and is using criticism of his conditioning as motivation ahead of his meeting with Jack.
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Groves fights Jack at the MGM Grand in Las Vegas on September 12, on the undercard of Floyd Mayweather's welterweight fight with Andre Berto, amid ongoing concerns about his stamina.
The super middleweight's endurance his been a concern on more than one occasion, not least during his two defeats by Carl Froch, but he has spent the past eight weeks training in the mountains at altitude at Big Bear, California, and is using criticism of his conditioning as motivation ahead of his meeting with Jack.
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