Tyson Fury vs Francis Ngannou would 'do bigger business than Floyd Mayweather and Conor McGregor', according to Bob Arum.
The legendary promoter insists that the clash of the titans would eclipse 'the biggest fight in combat sports history'.
Fury, 33, dispatched Dillian Whyte in style at Wembley on Saturday.
Ngannou holds the UFC belt and was ringside to watch Fury beat Whyte, with the two taking part in an impromptu interview on ESPN afterwards.
The WBC and UFC heavyweight champions are very excited by the prospect of fighting one another and Arum believes they must face each other in a crossover blockbuster showdown that he insists will be even more lucrative than 'The Money Fight' in 2015.
Arum told BoxingScene.com: “This UFC guy, assuming that he’s able to fight, that’ll do monumental business.
"They know each other and they know how much there is to be made for that fight.
"I think Fury and this UFC heavyweight champion, Ngannou, do bigger business than Mayweather and McGregor.”
Tyson Fury pictured with Francis Ngannou
Ngannou, 35, is currently embroiled in a contract dispute with UFC president Dana White as he wants to pursue a career in boxing as well as mixed martial arts.
And he's confident that both sides will be able to reach an agreement, telling The MMA Hour': "We both want this fight, that's clear, and we respect each other.
"Probably next year it will happen.
"I think it's going to happen, it's just a matter of our promotions, but we will sort this out at some point.
"The Tyson Fury fight has to be part of the discussion [with the UFC] - there is no other option.
"The UFC is a great promotion and I want to keep fighting. The Tyson Fury fight is not my last fight, there's still a lot of fights out there.
"There's Jon Jones, there's the Stipe Miocic trilogy, there's big fights I can do in the UFC and I'd really like that to happen."
"Make it a hybrid fight, something that makes it a little uncomfortable for him as a boxer.
"Ideas like MMA gloves or fighting barefoot. I don't know, we still have to figure this out.
"I would say there's a 70% chance [my next opponent] is Tyson Fury. On his side I would say 90% against me."
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