Tyson Fury appeared to announce his retirement Monday.
The controversial heavyweight champion has twice pulled out of defending his WBA and WBO belts against Wladimir Klitschko, whom he defeated in November last year to claim the titles. An ankle injury and undetermined health concerns led to the two rematches being postponed.
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Widespread reports last week claimed that Fury had tested positive for cocaine, although no official statement has been forthcoming from the authorities or the man himself. The Voluntary Anti-Doping Association (VADA) declined to comment on the results of any test when contacted by Omnisport on Friday.