Floyd Mayweather Jr. vs. Conor McGregor was a professional boxing match between undefeated eleven-time five-division boxing world champion Floyd Mayweather Jr. and two-division mixed martial arts (MMA) world champion and, at the time, UFC Lightweight Champion Conor McGregor. The fight took place at T-Mobile Arena in Paradise, Nevada, on August 26, 2017, at the light middleweight limit (154 lbs; 69.9 kg). It was scheduled for twelve rounds and recorded the second highest pay-per-view buy rate in history.