FLOYD Mayweather attempted to bet $400,000 on himself winning his fight with Conor McGregor in under 9.5 rounds - but was stopped by the bookmaker, according to ESPN.
The 40-year-old made it 50-0 with a 10th-round stoppage on Saturday in a fight expected to earn him more than $200million.
But in the afternoon leading up to the fight, Mayweather is reported to have tried to place two bets on himself - one winning in under 9.5 rounds, which he narrowly missed out on, and another winning by knockout.
Nevada State Athletic Commission does not have any rules stopping fighters from betting on themselves.
"I think that we bet 100 on 9.5," Mayweather told the news provider after his victory. "I gave my guy six figures to go bet. I have to make sure he bet because earlier today I went to the sports book to bet and they wouldn't let me bet."
Mayweather frequently bets on other sports, posting updates on his social media accounts.
Fight fans, too, bet in their millions. Reports suggest the biggest bets on the fight were upwards of $1million, with an estimated €10m in Ireland bet on the bout. gh
McGregor v Mayweather
There may have been some empty seats at the T Mobile Arena due to the extortionate ticket prices, but Ireland's Imelda May stirred up the atmosphere with a haunting rendition of Amhrán na bhFiann ahead of Conor McGregor's boxing match with Floyd Mayweather.
It was one of the publishing sensations of the decade. In 2006, it was impossible to escape talk of the self-help manual, The Secret. Penned by former Australian TV journalist Rhonda Byrne, sales rocketed thanks to the endorsement of Oprah Winfrey.