The fight was later rescheduled for May 21 .
The fight was later supposed to be a co-feature with WBC heavyweight title fight between Deontay Wilder and Alexander Povetkin , until it was cancelled when Povetkin tested positive for drugs .
The fight was later rescheduled for May 21 and supposed to be a co-feature with WBC heavyweight title fight between Deontay Wilder and Alexander Povetkin , until it was cancelled when Povetkin tested positive for drugs .