MGM Grand, Las Vegas - Former WBA welterweight champion Luis Collazo suffered a bad left hand injury during his twelve round decision loss to Amir Khan, who was making his debut at 147-pounds. Collazo, who believes he fractured some bones in the hand, was down three times in the contest. The match was positioned as the co-feature to the Floyd Mayweather Jr. vs. Marcos Maidana welterweight unification.