The sportsbook didn’t rush to accept that proposition either, so Mayweather gave up on the idea. It has been reported that, whilst Mayweather himself couldn’t get his wager accepted, a friend of his did manage to bet on the fighter’s behalf. The friend had been given the $400,000 to place, but only managed to bet $87,000 of it.
The Mayweather v McGregor fight was massively popular with bettors, and the majority of bets were on the underdog to spring a surprise. Even so, despite more than 90% of bets siding with McGregor, the largest amount of money was on the champion, and that will have been very costly for sportsbooks around the world.
As for Mayweather himself, his inability to put his money where his reputation was won’t have made a great deal of difference to his financial outlook. The fight is said to have made the champion – who has now won 50 fights from 50 – more than $300 million richer than he was before. McGregor also did pretty well, making an estimated $100 million for the fight, which equates to around $3 million per minute.