Eddie Hearn, promoter for IBF, IBO, WBA heavyweight champion Anthony Joshua (20-0, 20 KOs), has no problem with having his boxer go to the United States to fight WBC champion Deontay Wilder (39-0, 38 KOs) in a unification showdown.

Joshua will first enter the ring for a unification with WBO heavyweight champion Joseph Parker (24-0, 18 KOs) on March 31 at Principality in Cardiff, Wales.

And Wilder is back in the ring on March 3, when he takes on Luis Ortiz (28-0, 24 KOs) in a voluntary defense at the Barclays Center in Brooklyn, New York.

Hearn wants Joshua to make at least three defenses this - with a mandatory defense in the summer and then a fight with Wilder by the end of the year.

And Hearn feels confident enough in Joshua's drawing power to stage the Wilder fighter fight in the United States.

"This could be the last time [Joshua] fights in the UK in 2018," Hearn told Sky Sports.

"The Wilder fight could be in America. We want to fight Wilder before the end of the year. Our plan is box three times this year - end of August or early September, then December. We've got a base in America already. We'd rather the fight was in the UK but we're not bothered if it has to be in America. No problem."

However, Hearn admits that he expects some very tough negotiations to reach a financial deal in a Joshua vs. Wilder fight.

In a recent interview, Wilder stated that he strongly felt that a Joshua fight should be an even 50-50 revenue split between the two.

Joshua, who is getting somewhere between 65-70% of the revenue in the Parker fight, is never going to agree to a 50-50 split with Wilder.

"[It makes it] more difficult, because if you go to the negotiating table with three belts instead of one, then you want an increase in the pie," Hearn said.

"Wilder is in a real fight against Ortiz, and victory would give him more value than he has at the moment. We have to give respect to Wilder because he's having a proper fight. I believe he will beat Ortiz. It depends how he wins. If he comes through a war, those fights can take a lot out of you. If he wins impressively, he sends out a good statement. Everyone is going in the right direction."