Tyson Fury's bout with Deontay Wilder for the WBC heavyweight title is in danger of losing its championship status by the end of the week.
The December 1 bout at the Staples Center in Los Angeles could see its status relegated to just being a non-title fight unless Fury commits to enrolling in the sanctioning body's Clean Boxing Program.
WBC President, Mauricio Sulaiman claims that Fury has signalled his intent to commit to the programme, with The Voluntary Anti-Doping Association (VADA) also waiting for confirmation.
In addition, Sulaiman has stated that it is only paperwork holding up the procedure which he insists has to be completed by the end of the week to allow the bout to go ahead as a title fight.
'Fury is not enrolled with the WBC Clean Boxing Program and he promised me personally, and even on Twitter, that he was enrolling. If he doesn't, the fight with Wilder will not be for the WBC title,' Sulaiman told Boxing News.
'I have been in touch with Fury and his trainer [Ben Davison] and they tell me it is just a matter of paperwork. They have the papers, they say.
'I don't want to put a deadline on it that it is not reasonable but it has to happen this week. That is plenty of time. If I don't get those papers, the WBC will not sanction the fight.'
WHAT IS THE CLEAN BOXING PROGRAM?
Introduced in 2016, it is administered by VADA after they joined forces with the WBC.
Its main goal, aside from testing, which can be random and out of competition, is to educate the athletes on the danger and disadvantages that doping can bring to their present and future wellbeing.
Fury failed a test for steroid nandrolone in 2015 and was handed a backdated ban that ran its course in 2017, while he has admitted to using cocaine in the past.
However any drug testing from now is already likely to be too late to prove effective given the few weeks until the fight takes place.
Wilder accused Fury of being nervous in a press conference ahead of the fight as the Manchester boxer taunted the American over his appearance and skinny stature.
That led to Fury pushing Wilder and as the champion attempted to launch back, with the security staff between them, the Brit shadow boxed and shouted: 'Any time of day, seven days a week, twice on Sunday. Bring it on, you big s***house.
'He needs all his men I don't need nobody. I came to America on my own, I stand my ground against any man born from his mother. Come on, you big dosser.'
Wilder hit back, claiming: 'Everything you say I'm gonna put it against you, trust me.' It prompted a simple response from Fury: 'He's getting knocked out.'
Read more: Why Deontay Wilder vs Tyson Fury could lose world championships status by the end of the week - Boxing News