Eddie Hearn, the promoter for IBF, IBO, WBO, WBA heavyweight champion Anthony Joshua, says a unification with Tyson Fury could easily end up overseas - as several big money offers are expected.
Joshua and Fury, provided both boxers stay on course, are potentially going to fight each other, twice, in 2021.
The two fighters reached an agreement on the monetary terms, with a 50-50 split.
While one of the two fights will be targeted to take place in a UK stadium, the other will head to an overseas venue.
"If you go to a fighter and their teams and, pulling numbers out of the sky, say you have £50 million to fight in the UK or you have £100 million to do the fight in the Middle East, it's a very short conversation. Because they understand the risks involved," Hearn said Talk Sport.
"If you ask Tyson and you ask AJ, 'where do you want this fight to happen?' – blimey, obviously in the UK! Two British heavyweight world champions and we will do everything we can to make the fight here, by the way. And I do believe that is what the fighters want as well. But even in the current environment, there has been a number of sizeable approaches from around the world to stage this fight – the biggest fight in boxing.
"This is a sport where both fighters put their health and their faculty and sometimes their life on the line. You can't expect fighters in a fight of this magnitude, the ultimate fight of their career, to take half the money to do it in the UK. We're in a situation at the moment in this country and, at the moment rightfully so, where the government doesn't invest money to bring major sporting events to this country. They've got enough on their plate, they certainly shouldn't be looking at that at the moment.
"Yet many countries, and we saw the Ruiz fight in Saudi Arabia, have funds in place to bring major sporting events to their countries. So a lot of those countries are going to be making major financial plays to stage this fight. Ultimately, it won't be me who decides. It will be the fighters who decide."
