Richard Schaefer, the CEO of Golden Boy Promotions, confirmed Wednesday that Floyd Mayweather will receive a record guarantee of $41.5 million (£26.62m) to fight Canelo Alvarez on September 14 in Las Vegas in a Showtime pay-per-view bout.
That will be the largest guarantee ever paid to a boxer.
The previous high was $33 million (£21.17m) paid to Evander Holyfield for his rematch with Mike Tyson for the heavyweight title on June 28, 1997.
Mayweather was given $32 million (£20.52m) guarantees in fights against Robert Guerrero on May 4, 2013, and against Miguel Cotto on May 5, 2012. Tyson earned $30 million (£19.24m) guarantees in each of his bouts with Holyfield.
Mayweather has earned $184 million (£118.02m) since May 5, 2007, when his Alvarez payday is counted.
His purse guarantees since then were $10 million (£6.41m) against Oscar De La Hoya; $11 million (£7.06m) against Ricky Hatton; $10 million (£6.41m) against Juan Manuel Marquez; $22.5 million against Shane Mosley (£14.43m); $25 million (£16.04m) against Victor Ortiz and $32 million (£20.52m) against Cotto and Guerrero.
That averages $23 million (£14.75m) a fight for him since 2007.
Mayweather, who loves cars and owns several dozen luxury vehicles, would hypothetically be able to buy more than 100 Rolls Royce Phantoms, which sticker for a minimum of $398,000 (£255,280), with that $41.5 million check (not figuring taxes).
He could earn more, taking in shares of the pay-per-view profits. Schaefer said all signs are encouraging and he expects a massive pay-per-view number. Mayweather's 2007 fight with De La Hoya sold 2.5 million pay-per-views and remains the record.
Schaefer declined to say what Alvarez is guaranteed, though sources have indicated it is $12.5 million (£8.02m).