Peter Fury, trainer and uncle of disgraced World Boxing Organisation (WBO) and World Boxing Association (WBA) heavyweight champion Tyson Fury has hit out at critics who are calling for the boxer to be stripped off his titles. Peter took to social median and said, "'you don't win world titles on coke [cocaine]".

The 28-year-old was embroiled in controversy after reports emerged that he had failed a Voluntary Anti-Doping Association (Vada) test for benzoylecgonine, a major metabolite of cocaine, following a random urinary sample collected on 22 September.

This led many to speculate that he may be stripped of his titles which he won by defeating Wladimir Klitschko via majority decision at Dusseldorf in Germany last November. It was a huge blow for the Ukranian and it was made all the more special as it was his first loss in over 10 years. The rumours have hurt his uncle and trainer, who is not happy with the criticism.

"I make excuses for no one. I can only trust my family's word. I don't live or socialize outside of the gym. A statement I can 100% make 'you don't win world titles on coke. Only dedication and determination #nothing else. Enough of bullshit and wannabe heroes out there. On with business as per usual. Any d**** on here that's not happy –go tell Tyson to his face I suggest, rather than kiss his ass for autographs and then sell them on ebay," Fury wrote on Twitter.

Fury was earlier charged by the UK Anti-Doping (Ukad) in June for the alleged presence of a prohibited substance anabolic steroid nandrolone, and was scheduled to face a hearing with the independent National Anti-Doping Panel. His provisional suspension was lifted pending full investigation, which meant that he was free to face Klitschko.

The current world heavyweight champion has not entered the ring since his win last November, cancelling a rematch twice. The first cancellation came in July where he withdrew due to an ankle injury with the second one coming last month with his team management confirming that Fury was medically unfit to go forward with the fight.