Floyd Mayweather thought he had escaped his beef with MMA superstars when Ronda Rousey was KO'd by Holly Holm at UFC 193.
With Rousey taking a step back, UFC featherweight champion Conor McGregor has filled right in.
McGregor has been chirping at boxing's biggest star for a while now, but things kicked up when GQ magazine featured the Irishman in a piece titled, 'Conor McGregor: 'I'm going to be worth more than Mayweather.'
Earlier this month, Mayweather told Fight Hype that he believes racism "still exists" in combat sports because of the different treatment he receives compared to McGregor.