Watch Marquez vs Diaz Live Stream Free. Juan Manuel Marquez vs Juan Diaz fight. Ring Magazine number three pound-for-pound boxer Juan Manuel Marquez will defend his WBA and WBO Lightweight world championship titles against rising boxing star Juan “Baby Bull” Diaz. The Juan Manuel Marquez vs Juan Diaz rematch is scheduled on July 31, 2010 9PM ET at the Mandalay Bay Resort and Casino in Las Vegas, Nevada, USA.
