Floyd Mayweather defeats Andre Berto by unanimous decision to retire on 49-0

Floyd Mayweather celebrates after defeating Andre Berto on points to finish with 49 career wins from 49 fights on Saturday at the MGM Grand Garden Arena in Las Vegas, Nevada.

After 19 years of perfection in the ring, he deserved one final bow.

The official scores were 117-111, 118-110, 120-108 for Floyd Mayweather.

The $32 million he earned was pocket change compared to what he got for Manny Pacquiao in his last fight. But the more important number was win No. 49 in the final fight of his unblemished career, tying the mark of the late heavyweight champion, Rocky Marciano.

"You gotta know when to go. I've had a great career," Mayweather said. "I'm leaving with all my faculties. I feel like I'm smart and sharp. What can I say, I was the better man tonight. I've accomplished everything. I've done everything in my sport."

"I pushed him to the limit," Berto said. "But he was just better. I was in great shape but it was difficult to fight him. He was really, really slippery."

        Floyd Mayweather hugs his mother Deborah Sinclair after his title bout against Andre Berto

                     Singer Justin Bieber was there to support Mayweather on Saturday.