Oscar Valdez (29-0, 23 KO), making the first defense of his WBC Junior Lightweight title, faces 2016 Olympic gold medalist Robson Conceicao (16-0, 8 KO), tomorrow night live from the Casino Del Sol in Tucson, AZ.  The entire card will stream exclusively on ESPN+ (English and Spanish) with undercard at 5:45 p.m. ET and the main card at 10 p.m. ET. (photos by Mikey Williams)

Valdez won the title with a spectacular one-punch knockout of Miguel Berchelt in February.  Both Valdez and Conceicao are unbeaten in their professional careers, but Conceicao holds a victory in the amateurs over Valdez at the 2009 Pan American Championships.  Conceicao is also the first Brazilian boxer to win an Olympic gold medal.

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Another world title fight featured on the undercard, Junto Nakatani (21-0, 16 KO) defends his WBO Flyweight title for the first time against former junior flyweight champion Angel Acosta (22-2, 21 KO).  Nakatani is ranked 3rd at flyweight by ESPN while Acosta is ranked 9th.

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