Floyd Mayweather is still undefeated in the boxing ring.

Mayweather (50-0) earned a 10th-round technical knockout victory over two-division mixed martial arts champion Conor McGregor (0-1), who was making his professional boxing debut, in a collision of combat sports veterans at the T-Mobile Arena in Las Vegas Saturday night.

With the win over McGregor, Mayweather broke a tie atop the all-time boxing standings. Previously, Mayweather was tied with boxing legend Rocky Marciano at 49-0.

Mayweather patiently studied McGregor over the first three rounds, and the proud Irishman threw plenty of shots that landed, leading to his winning those rounds on the unofficial scorecards. However, McGregor faded as the fight went on, and Mayweather took advantage by picking his spots.

One of the foremost MMA practitioners in the world and the first-ever simultaneous two-division UFC champion, McGregor had several clinches broken up by the referee. Also, Mayweather turned his back on McGregor to draw additional breaks from the official throughout much of the fight.

Prior to “The Money Fight,” the 5-foot-8, 151-pound Mayweather won the WBC super featherweight, lightweight, welterweight and light middleweight crowns, along with the IBF welterweight title, WBA (Super) light middleweight and (Super) welterweight titles and WBO welterweight championships.

On his way to a 49-0 record, the 40-year old Mayweather defeated Manny Pacquiao, Canelo Alvarez, Miguel Cotto, “Sugar” Shane Mosley, Juan Manuel Marquez, Marcos Maidana (twice), the late Arturo Gatti, Ricky Hatton and Oscar De La Hoya, all of whom are current or former champions across several weight classes.

Now, Mayweather adds a win over an MMA champion to his resume in what he promises will be the final fight of his boxing career.

Although McGregor lost in his professional boxing debut, he remains 21-3 in his MMA career, and has won nine of his 10 bouts in the Ultimate Fighting Championship.

Of his 18 wins by knockout or technical knockout, 16 have come via punches.

Although McGregor lost his professional boxing debut, he remains champion of the lightweight (155-pound) division in the UFC.