UFC light heavyweight champion Daniel Cormier has no idea why Floyd Mayweather Jr. would even entertain the idea of taking part in MMA.

A few years ago, Ronda Rousey was the biggest star in mixed martial arts, while Floyd Mayweather was the biggest star in boxing.

Mayweather, 41, retired from boxing last August after stopping UFC superstar Conor McGregor in the tenth round of a boxing match. The win took his record to a perfect 50-0.

For several months, Mayweather has been hinting at the idea of crossing over to the world of mixed martial arts.

And then last week, Mayweather said he was going to apply for an MMA license at some point in the future.

Mayweather has already accepted an open invitation to be trained, for MMA, by UFC welterweight champion Tyron Woodley. Their training camp is being claimed to start this week.

Given his vast fortune, his age, and his legacy in boxing - Cormier has no idea what Mayweather is trying to achieve here.

"I just don’t understand the point and I also don’t understand Tyron’s endgame in this. I told him the other day, ‘I don’t know what your endgame is, but I hate you because I didn’t think of it first,’ because I know it does involve Tyron making a bunch of money. [laughs]," Cormier told Stephie Haynes of Bloody Elbow.

"I don’t see why Floyd should fight MMA. Why does he need to? He’s 41 years old and the greatest boxer of all time. He’s rich beyond anyone’s imagination. I saw a video of Floyd’s Los Angeles mansion and he walked into this movie theater which is probably the most massive theater I’ve ever seen in my life. He had all these candy drawers and he’s walking around in socks because his carpet is so nice you can’t wear shoes and walk on it.

" What does this guy need a fight for? He’s got everything. He has so much money. This is not even money to last you a lifetime. This is generational money, the kind you pass down to your kids and their kids."