Boxing fans can catch watch Floyd Mayweather take on Andre Berto with an online live stream.

The Sept. 12 event will air live from the MGM Grand Hotel & Casino in Las Vegas, Nev., starting at 8 p.m. ET.

Mayweather will enter the ring to defend his WBA, WBC, and The Ring welterweight titles against his fellow American fighter. The reigning champ has a 48-0-0 record with 26 knockouts to his name. Last time Mayweather fought, he defeated Manny Pacquiao in a unanimous decision.

While not as high profile as Mayweather's last competitor, Berto has a solid record to his name. With a 30-3-0 record and 23 knockouts, the American fighter is coming off his March win against Josesito Lopez.

The undercard will feature matches between Roman Martinez and Orlando Salido (featherweight), Badou Jack and George Groves (middleweight), Johnny Gonzalez and Jonathan Oquendo (featherweight), and Ishe Smith and Vanes Matirosyan (welterweight).

Viewers can catch all the action here.