Floyd “Money” Mayweather revealed during a recent interview why he may lose to UFC Lightweight Champion Conor McGregor.

During an interview with ESPN, Mayweather talked about McGregor’s advantages in their upcoming boxing match.

“When you look at myself and Conor McGregor on paper, he’s taller, has a longer reach, he’s a bigger man from top to bottom,” Mayweather said.

“He’s a lot younger. I’ve been off a couple of years, and I’m in my 40s. So if you look at everything on paper, it leans toward Conor McGregor.”

Mayweather has been retired from the sport for almost two years. He is returning to the sport of boxing to fight McGregor in his professional boxing debut.

“I’m not the same fighter I was two years ago,” Mayweather said. “I’m not the same fighter I was five years ago. I lost a step. A fighter like Andre Berto isn’t even supposed to go the distance with Floyd Mayweather. But remember, I was 38. It’s obvious I’m slipping a little bit to even let a fighter like that go the distance with me. I’m not what I used to be.

“I used to have a 90 percent knockout ratio. It’s obvious I slipped somewhere. Something has taken a toll on my career.”

Mayweather vs. McGregor will take place Aug. 26 at the T-Mobile Arena in Las Vegas.