World Boxing Council boss Mauricio Sulaiman has a feeling Oleksandr Usyk and Tyson Fury blew their one chance to compete for all four major heavyweight titles.

Last week, talks to stage the undisputed heavyweight championship between Usyk, the WBO, WBA, IBF, IBO heavyweight champion from Ukraine, and Fury, the WBC titlist from England, finally broke down. The organizers were targeting April 29 at Wembley Stadium in London. The sticking point appeared to concern the financial split in a potential rematch.

Representatives of Usyk have suggested they will now comply with a WBA order to fight mandatory challenger Daniel Dubois, who shares the same promoter with Fury in Frank Warren’s Queensberry. Joe Joyce (WBO) and Filip Hrgovic (IBF) are also the top-rated contenders in their respective sanctioning organizations to challenge Usyk.

Although Fury and Usyk could resume negotiations later in the year—especially if the Middle East ends up becoming a possibility again—Sulaiman is not overly optimistic that their fight at that point will feature all four belts at play, given the cycle of mandatory challengers that each fighter will be subject to.

“The WBC has been extremely supportive of the ultimate unification fight between Fury and Usyk to determine the undisputed champion in the heavyweight division,” Sulaiman told Sky Sports. “It is extremely disappointing that such a match will not take place as this window of opportunity will not be there in a long time, it will be difficult to have everything aligned as there are mandatories for each organization.”

It is not clear what Fury intends to do next. Warren, his promoter, floated the possibility that the Manchester native could even retire.

Sulaiman told Sky Sports that his company is still awaiting confirmation for the WBC heavyweight eliminator between former titlists Deontay Wilder and Andy Ruiz. The winner of that would then become the mandatory challenger to Fury’s belt. Both Wilder and Ruiz are backed by Al Haymon of Premier Boxing Champions. (Fury, of course, has already fought Wilder three times, knocking him out twice).

“The WBC convention ruled that a final elimination would take place between Wilder and Ruiz to determine the mandatory contender of the division," Sulaiman said. "The WBC had been waiting for the confirmation of the unification fight so we will now review the following steps to be taken."