World heavyweight champion Tyson Fury will undergo a drug test before he fights Wladimir Klitschko in their rematch next month. The 28-year-old star is facing an investigation from the UK Anti-Doping Agency after allegedly testing positive for a banned substance.

Fury – who won the heavyweight titles from the Ukrainian in November 2015 – was charged by the UK Anti-Doping Agency and suspended from boxing earlier this year. However, the suspension was subsequently lifted "pending full determination of the charges".

The duo were originally set to rematch on 9 July, but Fury withdrew from the bout with an ankle injury. Fury – who has strongly denied any wrongdoing – revealed his injury on the same day it was announced he had been charged by the UK Anti-Doping Agency.

However, the much-discussed bout has since been rescheduled and Klitschko's manager Bernd Bonte has confirmed that the pre-fight tests will be conducted by the Voluntary Anti-Doping Association, according to the Daily Telegraph.

During a pre-fight press conference earlier this year, the larger-than-life Fury – who ended Klitschko's 11-year dominance of the heavyweight division in Dusseldorf, Germany – removed his shirt and warned Klitschko he was going to be knocked out by a man who is "as fat as a pig".

"I don't care about boxing, it is mainly about making a few quid and that's it. If that is all a professional can do then god help us all," Fury said to the former heavyweight champion. "What is the point practising for 40 years if you can't beat a fat man? Can I fight? Yes. Does it matter what a pit bull looks like? Does it f**k. Fat as a pig, 30 stone and I could beat you here and now."