Bob Arum said Julio Cesar Chavez could fight Brian Vera next, and eventually, Andre Ward.
Lem's latest: Martinez's promoter calls Chavez Jr. 'big challenge'
Can aging RING middleweight champion Sergio Martinez stop young juggernaut Julio Cesar Chavez, the unbeaten WBC beltholder? The two are scheduled to meet in a pay-per-view showdown this fall.

