The unification bout, labeled "Bad Blood," finally took place on September 14, 2002, at the Mandalay Bay on the Las Vegas Strip. The fight was even for the first six rounds, with Vargas landing punches on the ropes in the odd rounds, while De La Hoya outboxed him in the even rounds. De La Hoya took over the fight in the seventh round and hurt Vargas with a left hook in the tenth. In the next round, De La Hoya knocked Vargas down with a left hook and stopped him moments later. The win is widely considered to be the biggest of De La Hoya's career. Vargas tested positive for stanozolol after the fight.