Juan Manuel Márquez Méndez (born August 23, 1973) is a Mexican professional boxer. He is a former four-weight world champion, being the third Mexican boxer (after Érik Morales and Jorge Arce) to achieve that feat. Márquez has held seven world championships, including the WBA (Super) and IBF featherweight titles; the WBC super featherweight title; the WBA (Super) and WBO lightweight titles; and the WBO junior welterweight title. Additionally, he has held the IBO, Ring magazine, and lineal lightweight titles.
An exceptionally skilled combination and counterpuncher, Márquez is known for being a fast and highly technical boxer who is also willing to engage in slugfests with opponents, and is credited for his toughness; in a career spanning more than twenty years, he has never lost via stoppage. He is also known for his four-fight saga with Manny Pacquiao, as well as his fight against fellow Mexican Marco Antonio Barrera. Márquez is considered to be one of the greatest Mexican boxers of all time, and is ranked by BoxRec as the greatest Mexican fighter of all time, pound for pound.