Eddie Hearn claims he will not speaking about negotiations with Deontay Wilder in a bid to ensure he can agree a unification fight between the WBC champion and Anthony Joshua.
Wilder is a potential opponent for Joshuas April date at Wembley, after retaining his WBC belt thanks to a controversial draw with Tyson Fury.
Joshua says he would welcome either Wilder or Fury on 13 April and Hearn confirmed he is in talks with both camps.
But the Matchroom promoter announced he would not be speaking publicly about details of the negotiations.
I wont talk about the negotiations were having at the moment, because I did that last time and it bit me in the bottom, Hearn told Sky Sports News.
Im going to stay quiet, keep this mush peeled and shut, and try and make the undisputed heavyweight fight. Thats the priority, its always been the priority, always been the plan.
It is unlikely that a deal with either Fury or Wilder will be made in time for April, with Dillian Whyte the most likely opponent for Joshua.
Hearn and Joshua have plans to unify the heavyweight division for the first time in the weight class history in the next year, but Furys performance against Wilder has thrown a spanner in the works.
Fury will feel aggrieved not have left Los Angeles as the new WBC champion, and Hearn insists AJ does want to fight his British rival.
Josh still likes the Tyson Fury fight. Ive spoken to him numerous times, said Hearn.
Josh is in camp now in America, and he would love to fight Fury, he would.
Ive spoken to Fury yesterday, just said well done. I take my hat off to him. I was wrong. He proved me wrong against [Wladimir] Klitschko, he proved me wrong against Deontay Wilder.
I think what hes 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 Ill be wrong again, but its 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.