Former cruiserweight champion Tony Bellew is not convinced that Tyson Fury and Deontay Wilder are confident in their abilities to beat WBO, WBA, IBF, IBO world champion Anthony Joshua.
Joshua defends his belts against Jarrell Miller on June 1 at Madison Square Garden in New York City.
Fury is back on June 15th against Tom Schwarz, while Wilder will defend his WBC world title against Dominic Breazeale on May 18th at Barclays Center in Brooklyn, New York.
The two big issues in getting any of the three to fight each other - are their network affiliations and money.
Both fighters want 50-50 deals with Joshua.
Fury has TV deals with ESPN and BT Sport, while Wilder is with Showtime and Fox Sports - and Joshua is aligned with DAZN and Sky Sports.
“Tyson Fury's new deal with ESPN is a problem as television networks do not typically work too well with one another, and given both Anthony Joshua and Deontay Wilder are with other broadcasters, it's a bit ugly,” Bellew told the BBC.
“One thing we need, ultimately, is to know who the number one heavyweight is in the world. There has never been a fighter in any weight division in the history of boxing who has held three of the four belts - as Joshua does - and not been considered number one.
“So that makes that clear - Joshua is the main man, despite what some may say. And being number one, that gives you the financial lead when entering into any negotiations. If Fury or Wilder held three belts in the division, do you really think they would give an opponent 50-50?
“Joshua is offering some of these guys more in one night than they have earned in their whole career and yet they still want to complain. He's also saying if they win and they rematch, he'd flip the terms.
“We know who the number one is. If you believe you can beat him take the pay day and you'll make even more in the rematch. Do they really believe they can beat him though? I'm not so sure.”