Peter Fury, uncle and trainer of IBO/WBO/WBA heavyweight champion Tyson Fury, has taken to the social networks to hit back at the countless critics who are now targeting his nephew and downplaying his stunning win last November over Wladimir Klitschko to capture the titles in Germany. It was Klitschko's first defeat in over ten years.

Tyson has been in the hot seat for months - but this past Friday it was revealed that he tested positive for cocaine, with ESPN citing a leaked letter sent by the Voluntary Anti-Doping Agency.

"I make no excuses for no one. I can only trust my family's word. I don't live or socialise outside of the gym!! A statement I can 100% make 'you don't win world titles on coke. Only dedication & determination #nothing else!' Enough of bullsh*t and wannabe heros on here. On with business as per usual. Any d*cks on here that's not happy - go tell Tyson to his face I suggest, rather than kiss his ass for autographs and then sell em on [ebay]," Peter Fury stated on social media.

The letter sent by Voluntary Anti-Doping Agency (Vada) president Dr Margaret Goodman was issued to the representatives of Fury and Klitschko as well as the British Boxing Board of Control and the United States’ Association of Boxing Commissions.

“This letter is to advise you that the ‘A’ sample urine specimen number 4006253 collected from Tyson Fury on September 22, 2016 in Lancaster, England through his participation in the Voluntary Anti-Doping Association (Vada) programme has been analysed for anabolic agents, diuretics, beta-2 agonists, stimulants and drugs of abuse,” it read.

“The results of the analysis are as follows: Adverse. Urine specimen contains benzoylecgonine. Mr Fury has the right to promptly request analysis of the ‘B’ sample at his expense.”

Benzoylecgonine is the main metabolite of cocaine.

Earlier this year, Fury was charged with a doping offence by UK Anti-Doping after a urine sample from February 2015 - nine months before he beat Klitschko to win the WBA, IBO and WBO world titles - showed traces of the banned stimulant nandrolone.

At the time, Fury said he was innocent and is suing Britain’s anti-doping and boxing authorities.

Fury has been inactive since the win over Klitschko, as he withdrew from a July rematch date with and ankle injury and then withdrew from the rescheduled date of October 29th, with his team issuing a statement that Fury was medically unify to go forward with the fight.