John Isner will play either Novak Djokovic or David Ferrer in 2011 . He became the first American to reach Miami Open semi final since the last four . Kei Nishikori could not handle Isner 's serve 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 .