Philippine boxing superstar ­Manny Pacquiao threw down a fresh ­challenge to Floyd Mayweather on Thursday, daring the US world champion to "fight me" instead of setting terms that could torpedo the dream bout.

"He's all talk. Until now he has not yet agreed to fight me. Instead of blabbing, he should face me atop the ring," Pacquiao said.

Boxing fans the world over have been baying for a mega-fight between two of the world's greatest boxers of their generation, but previous talks have always broken down before a deal could be signed.

Pacquiao, 35, has held world titles in eight separate weight divisions.

He is training to defend his World Boxing Organization welterweight title against another undefeated American, Chris Algieri, in Macao in November.

Mayweather, who scored a lopsided victory over Marcos Maidana in a rematch in Las Vegas on Saturday, pushing his record to 47-0, later ­denied he was trying to safeguard his unblemished record by avoiding ­Pacquiao.

However, he said a Pacquiao bout would have to be on the American's terms.

Pacquiao retorted Thursday that great fighters did not avoid facing the best and did not let any challenge pass by.

The Filipino, who has won 56, lost five and drawn two fights, also dismissed the manner of Mayweather's second Maidana win, in which the American retained his World Boxing Council and World Boxing Association welterweight titles.

"To me, Maidana won that fight. Mayweather's face and lips were swelling compared to Maidana's ­unblemished face," Pacquiao said.