Manny Pacquiao thought he had won his bout against Floyd Mayweather in Las Vegas on Saturday.

But the judges saw the fight otherwise, scoring it 118-110, 116-112 and 116-112 in the undefeated American's favour to see Mayweather (48-0-0) retain his undefeated record with a unanimous decision.

Pacquiao felt he had done enough to win the bout at the MGM Grand, saying Mayweather made no impact.

"It's a good fight. I thought I won the fight," he said during an in-ring interview.

"He didn't do nothing. He always moved outside."

Pacquiao (57-6-2) said Mayweather's movement meant he was unable to land as many punches as he usually would.

"He's moving around," the Filipino said.

"It's not easy to throw a lot of punches if your opposition is moving around. If he stays then I can throw a lot of punches."