Las Vegas • Manny Pacquiao showed Saturday night he’s still got plenty of fight for a fighter on the wrong side of 40.

Whether Pacquiao’s dominating win over Adrien Broner gets him a rematch with Floyd Mayweather, though, is a question that will have to be answered another night.

With Mayweather watching from ringside, Pacquiao showed flashes of his old speed in winning a unanimous 12-round decision over Broner to easily defend his piece of the welterweight title. It was the 61st win of a remarkable career in which Pacquiao has won titles in eight weight classes.

Fighting for the first time at the age of 40, the senator from the Philippines won a lopsided decision that was never in doubt before a crowd that roared at every punch he landed. The decision was never in doubt, but Pacquiao pressed the fight into the later rounds as he tried unsuccessfully to score a knockout.

Two judges favored Pacquiao by a 116-112 score, while the third had it 117-111. The AP scored it a shutout 120-108 for Pacquiao.

There were no knockdowns, but Pacquiao landed the heavier punches — and lots of them. He caught Broner in the seventh and ninth rounds with big left hands that sent him backward, while Broner spent most of the fight looking for one big counter that never came.

Pacquiao, whose pro career stretches back 24 years, showed he still has the speed that carried him over his spectacular career. He also displayed some power, though he was never able to drop Broner.