Anthony Joshua is set to pocket a career-high purse for fighting Jarrell ‘Big Baby’ Miller on June 1 in New York.
The WBA, IBF and WBO champion was expected to defend his belts at Wembley on April 13.
But after failing to secure a big enough opponent, AJ will now attempt to crack America.
His promoter Eddie Hearn says a deal to fight New York native Miller is now close to completion and their Madison Square Garden showdown could be rubber-stamped before the end of the week.
And it is understood that Joshua will earn around £25m for his part in the Big Apple clash – which would eclipse the £20m he banked for beating Alexander Povetkin in September.
Most of the money will be stumped up by Hearn’s US broadcast partner DAZN, while Joshua will also earn via UK pay-per-view sales on Sky Sports Box Office.
Hearn said: “I would say it is 80 per cent likely that Joshua will fight Miller next.
“The money is not just coming from DAZN, it’s Sky Sports Box Office, it’s Madison Square Garden, it’s international TV.
“Every marketing executive and PR specialist have always said, ‘You have to fight in America’ and the timing just appears to be right.”