We love our Irish fighter, Conor McGregor, but it seems he's not too popular with one famous champion.
In an interview with FightHype.com, Floyd Mayweather said that UFC champion, Conor, is brash and arrogant.
He also said because Mr McGregor is white, he gets no heat for all the rude and irrational things he says.
"He talks a lot trash and people praise him for it, but when I did it, they say I'm cocky and arrogant. So biased," said Floyd.
He didn't stop there though, telling the website that he's annoyed because it all comes down to race.
"I ain't racist… "I ain't racist at all, but I'm telling you racism still exists," he finished.