Monday 16 May 2016 11:43, UK
Alexander Povetkin insists he has done nothing wrong despite his failed drugs test causing the cancellation of his shot at Deontay Wilder.
The Russian (30-1-KO22) was due to face America's WBC world heavyweight champion in Moscow on Saturday but has tested positive for meldonium.
Povetkin, who admits to taking meldonium before it became a banned substance last year, said: "I'm clean. I haven't taken anything or consumed anything, so I've got nothing to fear."
Wilder's manager contradicted a claim from Povetkin's promoter Andrei Ryabinsky that the fight was merely postponed - stating: "The fight is off. Not postponed. Off. We are gutted.
"All the hard work we put in with the time, effort and money is gone, through no fault of ours. The ripple effect from this cancellation reaches hundreds of people. We will take some time off and be back soon and continue to campaign and demand a clean sport and level playing field."
Ryabinsky responded: "It may end up in court. We are ready for that."
The WBC's investigation is ongoing.
