Novak Djokovic advances in the Mutua Madrid Open after Nishikori withdrew with wrist injury

MADRID (AP) -- Defending champion Novak Djokovic moved into the Madrid Open semifinals when Kei Nishikori withdrew before Friday's match because of a wrist injury.The sixth-seeded Nishikori said his wrist was not 100 percent and he didn't want to risk a mo