Eddie Hearn has pleaded with Deontay Wilder to forget about a rematch with Tyson Fury and take on Anthony Joshua instead.
Wilder came close to losing his heavyweight world title last weekend when he struggled to a draw against Fury in Los Angeles.
Both men have committed to a second fight next summer, leaving Joshua without an opponent for his next fight in April.
But promoter Hearn has not given up on convincing the American to bit to unify the four belts at Wembley.
"I won’t talk about the negotiations we’re having at the moment, because I did that last time and it bit me in the bottom," Hearn told Sky Sports News.
"I’m going to stay quiet, keep this mush peeled and shut, and try and make the undisputed heavyweight fight. That’s the priority, it’s always been the priority, always been the plan.
"Josh still likes the Tyson Fury fight. I’ve spoken to him numerous times. He is in camp now in America, and he would love to fight Fury, he would."
Fury climbed off the canvas in the final round against Wilder before he was denied victory by the judges.
It was only his third fight since returning from a near three-year absence during which he battled depression.
But Fury’s performance has not swayed Hearn from believing his man is the best in the world.
He added: "I spoke to Fury yesterday, and just said well done. I take my hat off to him, I was wrong. He proved me wrong against [Wladimir] Klitschko and he proved me wrong against Deontay Wilder. I think what he’s done is remarkable.
"I still believe Anthony Joshua is hands down the best heavyweight in the world. I believe he knocks out Deontay Wilder and Tyson Fury, but maybe I’ll be wrong again, but it’s a brilliant time for the heavyweight game.
"There is a rematch that could happen between Wilder and Fury. But if Wilder really wants to be the undisputed heavyweight champion of the world, he must fight Joshua next, otherwise we may just all miss the boat on that one. But anything can happen."