By Edward Chaykovsky

Manny Pacquiao is not giving up in his quest to secure a rematch with Floyd Mayweather Jr.

Mayweather decisioned Pacquiao after twelve rounds of action this past May at the MGM Grand in Las Vegas.

Pacquiao claimed that he entered the ring with a pre-existing shoulder that affected his performance during the fight. He says he further injured himself in the fourth round. The right shoulder was operated on a few days later. 

The Filipino star believes the possibility of a rematch is very likely.

"It's possible -- very much," he told CNN World Sport at a charity event in Abu Dhabi. "I would love to have a rematch if he wants it."

Mayweather announced his retirement from the sport in September, after winning a twelve round decision over Andre Berto.

Pacquiao was pressed on the issue of Mayweather being retired, but he doesn't believe the pound-for-pound king is away for good. Mayweather announced his retirement on at least two other occasions and then eventually returned to action.

"Of course we hear from him many times that he has retired. It's not new for him," Pacquiao said.

Pacquiao himself is promising to retire after his next fight. He will return to the ring no later than April 9th of next year. The opponents being considered include Terence Crawford, Amir Khan and Timothy Bradley.