John Isner will play either Novak ##erer or David ##erer in the last round . He became the first player to reach Miami slam semi final since 2011 . ni Nishikori could not overcome Isner 's loss in a 6 - 4 , 6 - 3 defeat .
John Isner will play either Novak Djokovic or David Ferrer in the last four . He became the first American to reach Miami Open semi final since 2011 . Kei Nishikori could not handle Isner 's serve in a 6-4 , 6-3 defeat .