Tyson Fury was fighting for his boxing future on Friday after media reports said he had tested positive for cocaine and faced being stripped of his heavyweight title belts.
The 28-year-old Briton had been due to defend the WBA and WBO world titles against Wladimir Klitschko in Manchester on October 29, but the bout was called off last week for a second time for unspecified medical reasons.
A spokesman for Hennessy Sports declined to discuss the cocaine claims, which were made by US-based broadcaster ESPN, which said that Fury tested positive after giving a urine sample on September 22.
Contacted by Press Association Sport, the spokesman said the beleaguered Fury camp would not be making a statement.
ESPN reported Fury was tested by the Voluntary Anti-Doping Association (VADA), which is based in Las Vegas, as part of the routine agreed by both fighters before the fight.
One attempt at a rematch with the Ukrainian Klitschko had already been abandoned because of an ankle injury sustained by the British fighter.
AFP