The Ukrainian fighter will defend his heavyweight world titles against Daniel Dubois this weekend but his promoter Alexander Krassyuk is still determined to make a historic unification bout with Fury after talks between the pair broke down earlier this year.

The promoter said: "It's our obligation to deliver this fight.

"The whole world wants to see this fight. Not just ourselves or people involved in boxing, but the whole world.

"People who know nothing about boxing would love to see the heavyweight undisputed fight for the four belts for the first time in the four-belt era.

"I can promise you and promise all the fans around the world that I will do everything that can depend on me to make this fight happen."

Fury has opted for an exhibition bout against UFC star Francis Ngannou in October and Usyk thinks that the Gypsy King's decision is "not good" for the sport of boxing.

He said: "I think it's easy money for Tyson Fury. For me it looks a little bit strange, too strange.

"A guy who is WBC heavyweight champion instead of fighting a guy from the top 10, suddenly chooses the guy as his opponent coming from the UFC. For Ngannou, this is cool. But for Tyson Fury, it isn't.

"Your perception and my perception are different. You treat it like a show, I treat it as an athlete. If he chooses this way, OK I respect his choice."