Matchroom Sport chief Barry Hearn has said Deontay Wilder just has to “add his signature” to a contract to fight Anthony Joshua on 13 April.
Anthony Joshua who currently holds the IBF, WBA and WBO world heavyweight titles has agreed to defend his titles against Alexander Povetkin at Wembley Stadium on 22 September.
Joshua, 28, is contracted to fight at Wembley in April, but no deal has been reached with WBC title-holder Wilder.
“Wilder has to ask: ‘Do I really believe I can beat him?'” said Hearn.
All of Joshua’s titles will be on the line when he meets 38-year-old Povetkin, who has 34 wins from 35 fights.
Wilder aired his frustrations when negotiations to face Joshua in September were unsuccessful, and his team says the 32-year-old will not sign for April if “below-market terms” continue to be offered.
Hearn admits the drawn-out negotiations increase the risk of either man being beaten in the interim, but insists he sees no rush as the long-term plan is to make Joshua “a billionaire, not a millionaire”.
Hearn added: “I think it will happen quite soon. Probably sooner than I would like. I’d like it in two years when they are both huge and we are talking about a billion dollars income, and not $100m income.”