Manny Pacquiao looking for knockout

“I want to erase the doubt of the last three fights,” Pacquiao said. “There’s so many people still asking if I won the fights. I think to myself, ‘Something is wrong. I have to do it again.’ This time, I will train hard to put this fight up in the history of boxing. I want to make this fight short. I want to knock him out.”

Although they’re extending a rivalry to rare lengths in modern boxing, the fighters and promoters believe fans will warm to the matchup when they remember just how good the first three fights were.

Pacquiao and Marquez fought to a draw in 2004, while Pacquiao won by split decision in 2008 and again by majority decision last year. The bouts featured knockdowns, wild momentum swings and fascinating contrasts in technique — but Marquez and many fans still believe he won all three fights, while Pacquiao says he clearly won the last two.