article_snippet.sent: John Isner is up next for Novak Djokovic after the American made it back-to-back wins over top-10 opponents.
article_snippet.sent: John Isner celebrates after defeating Kei Nishikori 6-4, 6-3 in John Isner quarter-final and will play Novak Djokovic next .
article_snippet.sent: John Isner makes a return on John Isner way to victory during the quarter-final tussle in Miami .
highlights_snippet.sent: No 1 now faces John Isner, who beat Kei Nishikori 6-4, 6-3 .
  Serena Williams and Carla Suarez Navarro will contest women's final .
  