TYSON FURY has launched a legal case against UK Anti-Doping after drug claims.

The world champ’s lawyers lodged High Court papers to refute charges that he used a performance-enhancing substance. Fury, who denies the doping allegations, is demanding answers over why he has been charged and also wants damages.

4 Tyson Fury defeated Wladimir Klitschko back in November to become champion Credit: Getty Images

UKAD’S rap dates back to urine samples taken in February 2015.

They showed traces of banned substance nandrolone — nine months BEFORE Fury’s title win over Wladimir Klitschko.

4 Tyson Fury will have his rematch against Wladimir Klitschko in October Credit: AP:Associated Press

And Fury wants to know why it took until June 24 this year for charges to be brought.

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The Mancunian heavyweight says he was told by UKAD he would face no action over the test.

Fury’s legal team say a second test showed no traces of the anabolic steroid and that a blood test at the time was also negative.

4 Tyson Fury was due to face Wladimir Klitschko in July but was ruled out by injury Credit: Getty Images

It will also be stated that Fury, 27, was tested on seven other occasions in the 18 months prior to the Klitschko fight — all returned negative results.

4 Tyson Fury has been embroiled in some fiery press conferences with Klitschko Credit: News Group Newspapers Ltd

Team Fury claim they were told by UKAD that the contamination of a dietary supplement was the most likely explanation of the positive result.

Fury’s big rematch against Klitschko is scheduled for October 29.