Alexander Krassyuk, co-promoter for former undisputed cruiserweight world champion Oleksandr Usyk, believes Anthony Joshua will vacate his WBO title in order to move forward with a high profile unification with WBC champion Tyson Fury.

Usyk (17-0, 13 KOs) is currently scheduled to face heavyweight veteran Dereck Chisora (32-9, 23 KOs) on October 31.

Joshua is slated to defend his WBO, IBF, WBA, IBO world titles against the mandatory challenger under the IBF, Kubrat Pulev, on the tentative date of December 12.

Should Joshua (23-1, 21 KOs) win - he would then want a showdown with Fury in 2021 - provided Fury wins his trilogy fight with Deontay Wilder.

Usyk has already made it clear that he doesn't have any intention of stepping aside in order to allow a Joshua-Fury fight to take place.

If Usyk beats Chisora and then presses the issue to face Joshua in a mandated title fight, the British will only have one possible scenario to move forward with Fury - and that scenario is to vacate the WBO belt.

Joshua and Fury have already agreed on the financial terms for a two-fight series, but an actual agreement is far from a reality.

“Usyk is mandatory for the WBO title, he is not mandatory for AJ personally," said Krassyuk to

"He is mandatory for the belt and whoever owns the belt is the possible opponent. Many people from a boxing audience would love to see Usyk and AJ, especially here in the Ukraine but also throughout the world.

“[But] Fury-AJ is much more anticipated because they are two British guys, two heavyweights. If there is a chance for AJ to fight Fury, I think he will vacate, that’s my personal feeling."