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Lineal middleweight champion Sergio Martinez and titleholder Julio Cesar Chavez Jr., who both submitted to random urine tests conducted by the Nevada State Athletic Commission on July 11, had their drug tests come back negative on Thursday.

With none of boxing's heavy hitters willing to take on Sergio Martinez, the middleweight kingpin decided to accept a broadband-aided challenge from little-known Brit Darren Barker.