Six months after the fight subsequent to Barrera, Pacquiao challenged Juan Manuel Marquez, who at the mature held both the WBA and IBF Featherweight titles. The brawl took area at the MGM Grand Arena, Las Vegas, on May 8, 2004.
In the first round, Marquez was caught cool, as he was knocked all along three time by Pacquiao. However, Marquez showed pleasing heart to recover from the to the front knockdowns and went in this area to win the majority of rounds thereafter. This was largely due to Marquez's counterpunch style, which he managed to effectively utilize neighboring-door to the unpleasant style of Pacquiao. At the decline of a deeply muggy broil, both boxers felt they had finished sufficient to win the broil. The bout was scored a pull, which proved to be a controversial decision. The genuine scores were 115-110 for Marquez, 115-110 for Pacquiao and 113-113. The judge who scored the bout 113-113 admitted to making an error upon the scorecards, having scored the first circular as 107 supportive of Pacquiao instead of the okay 106 for a three-knockdown round. If he had scored the round 106 for Pacquiao (as the other two panel of jury did), the result would have been a split decision approving of Pacquiao.However most pundits scores favored to Marquez