Conor McGregor should let Floyd Mayweather Jr "kick his a** for a lot of money" before returning to UFC, the former five-division world champion has said.
MMA star McGregor became the first fighter to simultaneously hold titles in two UFC classes when we won the lightweight championship last November and now seemingly has his sights set on Mayweather.
The American retired from boxing with a perfect 49-0 record after defeating Andre Berto in September 2015, but has suggested he could return to the ring to take on McGregor.
Mayweather thinks the Irishman would be wise to agree to the lucrative bout before his next UFC appearance - though the 40-year-old does not see his potential opponent being a success either way.
"The difference between me and him is this: he has to fight. If I was him and I was smart, before I lose again in the UFC I'd let Floyd Mayweather kick my a** for a lot of money. It makes business sense," Mayweather told The Telegraph.
"There's a difference between being an employee and an employer. If someone says 'I want to fight Floyd Mayweather', I can simply say 'yes, let's make it happen'.
"But when you've got a guy like Conor McGregor he has to talk to [UFC president] Dana White. Dana has to talk to Dana's bosses. Conor's not a shot caller.
"This guy said I'm a p***y, I'm scared, I'm a chicken. All 49 said the same thing and all the results were the same. So with that being said, if Conor McGregor really wants to fight me, we can make it happen. But is he blowing smoke up everybody's a**? We need to know."