Anthony Joshua and Oleksandr Usyk have both passed their final drug tests following their heavyweight title clash last month.
Joshua was comfortably outboxed in front of over 63,000 fans at the Tottenham Hotspur stadium last month, losing his heavyweight titles to the unbeaten Usyk in his hometown.
And the Voluntary Anti-Doping Ageny (VADA) has confirmed both fighters’ final samples came back clean.
Joshua has insisted that his opponents enrol with VADA for a 10-12 week period before they meet in the ring, which all have obliged to date.
That process saw Jarrell ‘Big Baby’ Miller miss out on a shot at the heavyweight world champion in the summer of 2019 when he failed multiple drugs tests.
Joshua would instead go on to fight Andy Ruiz jr, who took his belts in a thrilling encounter at Madison Square Garden before losing them in an immediate rematch.
The drug testing process has assured that Joshua’s fights with the likes of Ruiz, Kubrat Pulev and Usyk were clean of any illegal substances.
He was a favourite heading into the clash with Usyk, having comfortably beaten Pulev and Ruiz in his two outings after the shock defeat in New York.
He handily outboxed Ruiz for 12 rounds in Saudi Arabia just months after being stopped in their first meeting, before brutally knocking out Pulev in December 2020.
And he was preparing to face Tyson Fury for the undisputed title in the summer of this year, with an August 14 date back in Saudi planned before the fight was pulled.
Fury was ordered in arbitration to face Deontay Wilder for a third time, which he did last weekend, and the WBO ordered Joshua to fight Usyk.
The mandatory challenger was an undefeated, undisputed cruiserweight champion and pound-for-pound great prior to facing Joshua.
But in his two outings at heavyweight, he had looked decidedly unremarkable against Chazz Witherspoon and Derek Chisora in winning efforts.
However, he appeared to have found his footing at the weight when he stepped in against Joshua, out-landing him early and taking control of the ring.
And despite rallying in the middle rounds, Joshua could never fully regain that control and was beaten for a second time in his career to once again lose his unified titles.
Joshua has immediately exercised his rematch clause, and will face Usyk for a second time in early next year, with April 4 a prospective date according to rival promoter Bob Arum.
This means that an undisputed fight likely wouldn’t happen until the latter half of next year.
“Joshua and Usyk, I think they’re going to wait until April 4,” Arum said in an interview with FightHub.
“I think Fury will fight again in March or April. Then we can look to a September or October match for a unification.”