The American boxer earned over £200million from his victory over McGregor in 2017. The 43-year-old officially retired from the ring after 50 wins from 50 fights following that win over McGregor.
The UFC star is confident that Mayweather would be unable to knock him out within 11 rounds, and remained similarly bullish about his chances of victory inside the Octagon.
Floyd Mayweather has revealed the mind-boggling sum of money required for him to fight Conor McGregor and Khabib as the undefeated boxing star eyes up a return to combat sport.
Khabib Nurmagomedov has revealed that he has been offered a lucrative amount of money to fight Floyd Mayweather in Saudi Arabia.
Mayweather's ex-girlfriend Josie Harris, who is the mother of his three children, was found dead in her car last week, while his uncle and trainer Roger passed away at the age of 58 on Wednesday.
Mayweather has been an active presence since his last world title fight in 2015 as he has teased fans about a possible return to the ring, with a rematch against Conor McGregor mooted recently.
Floyd Mayweather made a passing dig at Conor McGregor before a sparring session on Sunday, claiming that the UFC star does not want a rematch.
It's boxing versus basketball. Floyd Mayweather Jr is far from happy after he was snubbed for the Male Athlete of the Decade in favour of NBA star LeBron James.
Wilder's camp confirmed on Sunday that they have activated a rematch clause in his contract following the defeat against heavyweight rival Fury in seven rounds in Las Vegas.
EXCLUSIVE INTERVIEW BY JORDAN SEWARD: Sam Jones has gone from car salesman to boxing manager in three years. He has struck a deal with Floyd Mayweather and works with Joe Joyce.
He made it ran fake cash with his face printed on it at strippers who provided entertainment. They swung above the crowd on disco balls and model airplanes that read Air Mayweather.
Floyd Mayweather Jnr was in typically lavish form as he flexed his muscles behind the wheels of his newly-purchased THIRD Bugatti Veyron on Sunday night.
Shutting Floyd Mayweather up is not easy. But pop star Rihanna did her best to keep the Money Man quiet as the pair sat next to one another at the BET Awards on Sunday night.
As Floyd Mayweather continues to consider his next opponent, it appears the boxer isn't letting it ruin his social life as he partied at the BET Awards in Los Angeles.
The 39-year-old, dressed all in black, was accompanied by former girlfriend and mother of his daughter, Melissa Brim, as he was photographed attending the BET Awards in Los Angeles.
Fury claiming the WBC title from Wilder in a spectacular display last month means he and Joshua, the WBA, IBF and WBO champion, hold all four of the major belts in the heavyweight division.
JEFF POWELL: Still the arguments rumble on. Who was the Fighter of the Decade just gone? Time to settle it before the first January of the New 20s is out.