Gallery: 
 

AP Julio Cesar Chavez Jr., left, exchanges punches with Sergio Martinez during the WBC middleweight title fight, Saturday, Sept. 15, 2012, in Las Vegas. - Photo

Julio Cesar Chavez Jr., left, exchanges punches with Sergio Martinez during the WBC middleweight title fight, Saturday, Sept. 15, 2012, in Las Vegas.

Sunday September 16, 07:11 AM
Julio Cesar Chavez Jr., left, exchanges punches with Sergio Martinez during the WBC middleweight title fight, Saturday, Sept. 15, 2012, in Las Vegas. Martinez won by unanimous decision. (AP Photo/Julie Jacobson)