Which boxer defeated Antonio Margarito in 2010 to win a super welterweight world title?

Manny Pacquiao defeated Antonio Margarito in 2010 to win the vacant WBC super welterweight world title. Their fight took place on November 13 at AT&T Stadium in Arlington, Texas, and Pacquiao won by unanimous decision.

The official division limit was 154 pounds, but the bout was contracted at a 150-pound catchweight. Pacquiao weighed 144.6 pounds, while Margarito came in at the 150-pound limit. Despite the size difference, Pacquiao's speed, movement, and combination punching carried him to a wide decision on scores of 120–108, 118–110, and 119–109.

The victory gave Pacquiao a world title in an eighth weight division, a defining achievement in his career and one reason he became known as an unusually versatile champion. He had already won major titles from flyweight upward before challenging at super welterweight.

Margarito suffered serious facial injuries, including a fractured orbital bone, and went directly to hospital after the fight. Pacquiao later relinquished the WBC title rather than defend it, so the championship was declared vacant in 2011.