Frank Warren believes that Oleksandr Usyk will not be undisputed heavyweight champion for too much longer.
The Ukrainian is the first ever heavyweight ruler of the four-belt era, and his win on Saturday saw him make history in perhaps the best fight of the year, live on DAZN .
The duo are still likely to go through a rematch, but it is unclear whether all four belts will be on the line.
The IBF is next to force its mandatory challenger, and that means Usyk may be obliged to fight Filip Hrgovic unless a compromise can be reached.
Warren sees a situation where Usyk vacates, setting up Hrgovic with Daniel Dubois for a title fight this summer.
Warren told Sky Sports : "He's [Usyk] done something no one else has done. He's unified the four belts.
"Four belts on the line is the start. I'm quite sure they'll fragment after that. And then it'll happen again.
"We're in such a good place as a sport and they're such good things happening you just can't see it ending, because there's so many good fights to be made.
"We've got the [Usyk vs Fury] rematch, provided [Anthony Joshua] keeps winning [he can be in the mix], and then you've got all our youngsters coming through.
"Hrgovic and him [Dubois] is a great fight and the winner of that, I think everybody's going to be happy with who the winner fights."
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