Anthony Joshua has received an offer from Deontay Wilder, confirmed as a 50-50 split with a guarantee of $50m, and has been told to respond in the next 24 hours.

Joshua, trainer Rob McCracken and promoter Eddie Hearn received emails sent directly from the Bronze Bomber’s personal address, with his promoter Shelly Finkel subsequently confirming an offer had been made.

Wilder also made an offer on Instagram and Joshua immediately responded saying he would accept if it was £50m.

In an exclusive interview with Sky Sports, Finkel confirmed a take-it-or-leave it $50m (£35.9m) offer had been made, with a deadline of “close of play on Thursday”

Finkel told Sky Sports the money and the deal is in place.

“We want [Joshua] to fight Deontay in his next fight and we offered him $50m,” he told Sky Sports.

“If he accepts it, it will be there. Al Haymon and I have never not delivered what we’ve offered.

“We were offered $12.5m (£8.8m) to fight him but we have offered four times that. If [Joshua] says he is not going to take $50m, it means he doesn’t really want to fight him next.

“It was $50m against 50 per cent. He said, ‘get me $50m against 50 per cent and I’ll take it the next day, I swear’.”

Wilder’s offer will also give him and his team control over the show and the venue, but Finkel admitted that if Joshua does agree, the showdown does not have to take place in America.

Hearn has revealed that the date mentioned is “between September and December” this year.

Joshua’s promoter, who is in New York for a Matchroom Boxing USA card in Brooklyn, suggested the offer was a “great PR stunt” but with the two promoters due to meet on Friday, he is now taking it seriously.

“We got an email from Deontay Wilder’s personal email address offering us a 50-50 split with a guarantee of $50m,” Hearn told Sky Sports.

“He said that in an interview Anthony said, ‘give us £50m and we will sign tomorrow’. They have asked us to give them written acceptance of the deal by tomorrow.