Oleksandr Usyk 'gifts' IBF boxing title to Anthony Joshua or Daniel Dubois
Ukrainian boxer is obliged by IBF rules to forfeit the belt if he cannot fight their challenger because of a commitment to meet Tyson Fury in a rematch.
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Usyk's undisputed heavyweight champion status will go because he cannot fight the IBF's challenger as he will be involved in a rematch with Tyson Fury.