Manny Pacquiao vs. Juan Manuel Márquez III, was a professional boxing match contested on November 12, 2011, for the WBO welterweight championship.

Both encounters were shrouded in dispute with regards to who won and this subsequently led to a rubber match between the two fighters where Freddie Roach, Pacquiao's trainer, said that he wanted to leave "all doubt behind."

[6] The bout took place at the MGM Grand in Las Vegas, Nevada and was distributed by HBO PPV at a catchweight of 144 lbs.

Upon the results being announced, the crowd reaction was largely negative with thousands continuing to boo[10] as Pacquiao spoke with Max Kellerman.

[11] Freddie Roach has addressed the Juan Manuel Marquez "foot-stomping" issue that has become a much discussed topic among Manny Pacquiao fans; he understands that when southpaws and orthodox fight, feet will inevitably collide.