Mayweather's win came via a fourth round knockout after he surprised Ortiz with a right-left combinations while he was waiting for referee's signal to resume the fight.
Before the end of the fourth round, Ortiz apologized to Mayweather for a foul (ruled by referee Joe Cortez as intentional) committed by Ortiz.
A few minutes before the end of the fourth round, Ortiz approached Mayweather to offer his apology for which the undefeated boxer seemed to have accepted, but while waiting for a signal from the referee, Mayweather first threw a powerful left hook that shook Ortiz and he followed it up with a power punch that sent Ortiz to the canvas where he was counted out by referee Cortes.
Mayweather has been criticized for unsportsmanlike behavior but he said in an intrview after the fight that what he did was legal quoting a established boxing rule that say in part— “to protect yourself at all times."
"We touched gloves and we were back to fighting and then I threw the left and right hand after the break," Mayweather said
. "In the ring you have to protect yourself at all times."
Top Rank promoter Bob Arum said Mayweather was “a big disgrace while Joe Cortez shouldn’t be refereeing any more.” Cortez said afterward, "Time was in. The fighter needed to keep his guard up. Mayweather did nothing illegal.", Philboxing's
Ronnie Nathanielsz wrote.
Future Mayweather foe Manny Pacquiao, who watched the fight on TV said, “what Mayweather did was legal but it's not the action of a sportsman. He just took advantage of that moment. I think Ortiz was trying to be nice to Mayweather.”
He added: "It appeared to happen in the heat of the battle and most important was Ortiz genuinely apologetic." He should have accepted the apology and fought a clean fight, he said.
With the win, Mayweather was successful in preserving his untainted boxing record of 42 fights without a single loss.
The new WBC welterweight champion has mentioned Pacquiao as possible opponent provided he takes the Olympic random drug test, a condition that caused at least two fight negotiations to fall apart in the last two years.