(CNN) It was almost three years ago that Manny Pacquiao and Floyd Mayweather fought in the "Fight of the Century" and now the 40-year-old Pacquiao wants to avenge his 2015 defeat.

After retaining his WBA world welterweight title on Saturday, the Filipino challenged five-weight world champion Mayweather, 41, to a rematch.

The retired Mayweather was ringside in Las Vegas watching Pacquiao beat American Adrien Broner with a unanimous points win.

In the post-fight press conference Pacquiao was repeatedly asked about the prospect of fighting the American again.

"My message is I'm still active, and if [Mayweather] goes back to the ring and wants to challenge me, I'm a champion. Get back to the ring and we will fight again if he wants," Pacquiao said.

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