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AP Julio Cesar Chavez Jr. enters the ring before fighting Sergio Martinez for the WBC middleweight title fight, Saturday, Sept. 15, 2012, in Las Vegas. M - Photo

Julio Cesar Chavez Jr. enters the ring before fighting Sergio Martinez for the WBC middleweight title fight, Saturday, Sept. 15, 2012, in Las Vegas. M

Sunday September 16, 07:12 AM
Julio Cesar Chavez Jr. enters the ring before fighting Sergio Martinez for the WBC middleweight title fight, Saturday, Sept. 15, 2012, in Las Vegas. Martinez won by unanimous decision. (AP Photo/Julie Jacobson)