Tyson Fury has been warned he must sign up to the WBC's clean boxing programme this week if he intends to fight for Deontay Wilder's title.
British heavyweight Fury is set to take on WBC champion Wilder in Los Angeles on December 1, with the pair agreeing a deal after lengthy negotiations between the American and Anthony Joshua failed.
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But Fury, who returned to the ring earlier this year, is not currently enrolled in the WBC's anti-doping programme, involving out-of-competition testing, and has now been told by president Mauricio Sulaiman that the bout will not receive championship status until he is on board.
"If he does not enrol, then the WBC cannot sanction the fight," Sulaiman told Sky Sports. "If Tyson Fury does not enrol in the clean boxing programme, the fight is not for the WBC title. He cannot win the title.
"He told me personally, publicly on Twitter. He sent a message, he had a fight, and he has been struggling with paperwork, so we understand that. We have that flexibility in our protocol, but now it's time. The time is now.
"I would say [it has to be] this week. I'm going to reach out to him, because there has to be testing for the fight, out of competition. The time is of essence. Hopefully he will enrol."
