Boxer Floyd Mayweather Jr. defeated UFC fighter Conor McGregor by 10th-round TKO to pick up the 50th win of his illustrious career on Saturday night in Las Vegas' T-Mobile Arena.
Mayweather, now surpasses Rocky Marciano, who retired in 1956 with a 49-0 record.
McGregor more than held his own in what was his first professional boxing fight, but the gulf between him and Mayweather grew the longer the fight went on.
After the bout reached the halfway point, McGregor began looking visibly fatigued.
Mayweather sensed an opening and showed a level of aggression rarely seen in his previous 49 victories.
He previously had landed 132 punches in other compared to 80 for McGregor entering the 10th round according to SHO Stats.
In the 10th round, Mayweather really went on the offensive, and McGregor had no answer for the barrage.
Referee Robert Byrd called for the bell aftervMayweather landed a series of blows without reply from McGregor.
Mayweather's last knockout victory was against Victor Ortiz in 2011.
Although McGregor is UFC's lightweight champion, he was clearly overmatched against somebody who's one of the best defensive boxers in history.
The likes of Manny Pacquiao, Canelo Alvarez, Miguel Cotto and Oscar De La Hoya have all tried to take down Mayweather and failed. McGregor stood little chance in what was his boxing debut.
Saturday's fight wasn't about putting on a competitive matchup in the ring.
Instead, it offered Mayweather what's likely to be one more massive payday and granted McGregor the opportunity to earn more from one night than he had over the entirety of his UFC career to date.