The light middleweight (154 lbs; 69.9 kg) fight took place in the T-Mobile Arena in Las Vegas, Nevada on 26 August 2017. Floyd Mayweather Jr was undefeated world champion in five different weight classes. Conor McGregor was mixed martial arts world champion in two different weight classes and UFC champion in the lightweight division. Mayweather Jr won the fight in the tenth round by technical knockout (TKO).

The fight registered the second highest pay-per-view purchase rate in history with 4.3 million purchases in the United States alone. The fight also achieved the second highest ticket sales in boxing history, with the live gate bringing in $55,414,865.79. Official tickets cost up to $10,000.