Floyd Mayweather comfortably outboxes IBF welterweight champion Zab Judah for the first 10 rounds in Las Vegas

Referee Richard Steele steps in after Judah lands a low blow and shot to the back of Mayweather's head in the 10th

Mayweather doubles up in pain while his uncle and trainer Roger gets ready to take his revenge on Judah

Chaos breaks out, with Roger Mayweather fighting through security at the Thomas & Mack Center to get to Judah

Former two-weight world champion Roger Mayweather is wrestled to the ground by Nevada police

Promoter Bob Arum shrugs off the madness after seeing his charge become a four-weight world champion