Floyd Mayweather was booed by the crowd after he announced as the winner of the "Fight of the Century" over Manny Pacquiao.
The fight took place at MGM Grand Garden Arena in Las Vegas, late Saturday night PT. Pacquiao now has a record of 57-6, while Mayweather boasts an unblemished 48-0 mark.
In his most recent fight before Saturday, Mayweather defeated Marcos Rene Maidana on a unanimous decision in September. Pacquiao topped Chris Algieri in November, also on a unanimous decision. Before Saturday, Pacquiao's last loss came in December 2012 to Juan Manuel Marquez.
Mayweather entered Saturday's fight as the favorite, though Pacquiao's odds had increased since the fight was announced in February.
GALLERY: MAYWEATHER DEFEATS PACQUIAO
Mayweather vs Pacquiao: SI's Best Photos
Floyd Mayweather won a unanimous decision over Manny Pacquiao to run his record to 48-0 on May 2. Here are SI's best pictures from the bout.
Two of the judges scored the fight 116-112 for Mayweather, while the other judge scored it 118-110.
Mayweather was successful in throwing his his jab to keep Pacquiao at bay.
Pacquiao threw far fewer punches than he normally does in a fight, with Mayweather actually throwing more. (Text credit: AP)
Pacquiao chased Mayweather around the ring most of the night, but was never able to land a sustained volume of punches. (AP)
After the fight, it was disclosed that Pacquiao injured his right shoulder in training and that Nevada boxing commissioners denied his request to take an anti-inflammatory shot in his dressing room before the fight. (AP)
By winning the welterweight bout, Mayweather cemented his legacy as the best of his generation. (AP)
Pacquiao thought he had won the bout, largely on the basis of a few left hands that seemed to shake Mayweather. (AP)
There were no knockdowns, and neither fighter seemed terribly hurt at any time. (AP)
Mayweather fought confidently in the late rounds, winning the last two rounds on all three scorecards. (AP)
The crowd of 16,507 cheered nearly every time Pacquiao threw a punch. (AP)
Ringside punch stats showed Mayweather landing 148 punches of 435, while Pacquiao landed 81 of 429. (AP)
In the corner, Mayweather's father kept yelling at his son to do more. But Mayweather was content to stick with what was working and not take a risk that could cost him the fight. (AP)
Pacquiao landed probably the biggest punch in the fight in the fourth round — a left hand that sent Mayweather into the ropes — but he wasn't able to consistently land against the elusive champion. (AP)
"He's a very awkward fighter, so I had to take my time and watch him close," Mayweather said. (AP)
Pacquiao had vowed to take the fight to Mayweather and force him into a war. His camp thought Mayweather's 38-year-old legs weren't what they once were. (AP)
"You're tough," Mayweather said to Pacquiao after the bout, hugging him in the ring. (AP)
The fight unfolded before a glittering crowd of celebrities, high rollers and people who had enough money to pay for ringside seats going for $40,000 and up. (AP)
In the final seconds of the fight Mayweather raised his right hand in victory and after the bell rang stood on the ropes, pounding his heart with his gloves. (AP)
"I thought we pulled it out," Pacquiao trainer Freddie Roach said. "I asked my man to throw more combinations between rounds. I thought he fought flat-footed too many times." (AP)
Mayweather says he'll fight one more time before calling it a career.
Pacquiao was escorted into the ring by Jimmy Kimmel.