Anthony Joshua is expected to earn between £40million-£60million in his rematch with Andy Ruiz Jr in Saudi Arabia on Saturday.
The Brit will be looking for revenge after suffering a shock defeat to the Mexican in Madison Square Garden six months ago.
And despite now holding the WBA, IBF & WBO heavyweight world titles, it is understood that Ruiz Jr will bank a set fee of around $10million (£7.7milllion) for the fight, which is significantly less than Joshua’s payday.
The reason for this is because many details of the second fight between the pair were pre-agreed in the contract for their first bout – through a rematch clause.
This clause had Ruiz Jr’s purse for the second fight already set out, though it is known that his team managed to negotiate a slightly higher number after initially kicking up a fuss about the bout taking place in Saudi Arabia.
Joshua meanwhile does not have a set fee, but he’s expected to eventually take home between £40million-£60million.
AJ’s final sum will depend on the pay-per-view sales generated by the event, mainly in the UK, but also worldwide.
The Brit’s huge earnings will not be the biggest in boxing history, with Floyd Mayweather holding that record for his £250million fight against Manny Pacquiao in 2015.
Joshua said: “When you look at it, out of every hundred quid, a lot goes to the taxman and a lot to the trainers and the team. Before you know it, what you’re left with in reality is about 30 to 40 per cent.
“Honestly, one of my main objectives in this sport was not to be owned. Not to be taken advantage of. It’s not easy in this sport. You put so much into it but before you know it your career is over.”
Saudi Arabia was chosen to host the Ruiz Jr vs Joshua rematch ahead of a rival bid from Cardiff’s Principality Stadium.
Human rights organisation Amnesty International have highlighted their concerns about the fight’s location in Saudi Arabia, owing to the country’s ‘abysmal’ human rights record.
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Restrictions on freedom of expression and women’s rights have been questioned, while the controversial death of Saudi journalist Jamal Khashoggi still looms over their heads.
Amid all of the controversy, it has not stopped the country holding major sporting events in recent months, including Amir Khan’s victory over Billy Dib in July and WWE pay-per-views Crown Jewel and Super ShowDown.