OLEKSANDR USYK could turn his attention to his mandatory challenger with an undisputed fight against Tyson Fury in major doubt.
The Ukrainian accepted Fury's "greedy" offer to unify all four heavyweight belts for the first time in history on April 29 at Wembley.
The WBA had ordered Usyk, 36, to agree terms for the unification or else face mandatory Daniel Dubois, 25.
But the governing body were informed that both sides had settled on a split and wanted to press ahead with the historic title clash.
Although Usyk's manager Egis Klimas has vented his frustration with no deal yet agreed and warned they could now fight Dubos instead.
Klimas told SNAC: "If this fight is going to happen, only April 29th. Or it's just going to be cancelled, and we'll go with the mandatory."
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The boxing manager revealed Fury's US promotional team Top Rank are now involved to try and smooth over negotiations.
But Klimas claimed the current unified heavyweight and ex-undisputed cruiserweight champion is being treated unfairly.
He said: "It's changed, Top Rank got more involved in it, but not too much.
"They’re still treating Oleksandr Usyk like they did with Derek Chisora, or Dillian Whyte.