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Juan Manuel Marquez, left, and Manny Pacquiao exchanges punches round during a WBO welterweight title fight, Saturday, Nov. 12, 2011, in Las Vegas. Pacquiao won by majority decision. (AP Photo/Isaac Brekken)

Juan Manuel Marquez, left, and Manny Pacquiao exchanges punches round during a WBO welterweight title fight, Saturday, Nov. 12, 2011, in Las Vegas. Pacquiao won by majority decision. (AP Photo/Isaac Brekken)