Manny Pacquiao threw down a challenge to Floyd Mayweather after demolishing Chris Algieri with six knockdowns on Saturday night in Macau, China.

"I really want the fight [against Mayweather]. The fans deserve it," said Pacquiao after beating Algieri on points, and then imitating a new TV commercial in which he mocks Mayweather.

It brought huge cheers from the sell-out crowd of 13,021 at the Venetian Macau venue, where the vast majority appeared to be Filipinos.

Many hundreds more of Pacquiao's compatriots were waiting patiently outside for a glimpse of their national hero, having arrived at the venue in the early hours of Sunday to find all the tickets sold.

Algieri, the unbeaten WBO light-welterweight champion, was outclassed from the start. The former eight-division champion landed punches at will as the quick Algieri tried to run, slip and hide from the onslaught.

But the congressman from Sarangani province in the Philippines really turned it when he smashed Algieri to the canvas with a devastating straight left in the sixth. The American only just beat the count and dropped to one knee moments later as blows rained in from all angles.

"I'm satisfied with the result," said Pacquiao. "I did my best. I was trying for a knockout but he was fast and keeps moving."