Anthony Joshua will face the winner of December’s fight between Deontay Wilder and Tyson Fury “subject to terms, without a problem in the world”, says Matchroom Sport chairman Barry Hearn.
Joshua retained his world heavyweight titles with a seventh-round stoppage of Russian Alexander Povetkin on Saturday.
He will return to Wembley in April to face a yet to be named opponent, with Dillian Whyte also in the frame.
WBC champion Wilder takes on Briton Fury on 1 December.
IBF, WBO and WBA champion Joshua confirmed after beating Povetkin that his “number one choice would be Wilder”.
“We have sent Wilder a signed contract already to fight on 13 April. We will agree terms with Wilder to fight on 13 April if he beats Tyson Fury – if he does not beat Tyson Fury, we have got to look around as we have got a business to run,” Hearn told newsmen.
“Tyson Fury will not be in a position to fight on 13 April in my opinion. If he is, I would love to see it.”
Fury’s promoter Frank Warren refused to confirm whether there was a rematch clause in the contract with Wilder, leading Hearn, whose son Eddie promotes Joshua, to say: “There has to be a rematch clause. Deontay Wilder is not going to risk his title without a rematch clause.
“I know Anthony Joshua has made his shopping list of who he would like to fight next and that is Deontay Wilder, but that is not to say the deal can be done.”
Warren insisted former champion Fury would demand a 50-50 split of the purse for a fight with Joshua.
“It is not a 50-50 split against the number one heavyweight in the world – you can forget that completely.”