As amazing as Istomin's win was over Djokovic, this was much more impressive. While Novak has been sleep walking the last six months, Murray has been a juggernaut. John McEnroe was choked up and teary eyed after the match. You just don't see a journeyman play at that level over an entire match against the best player in the world. And it wasn't like Murray had a letdown. Zverev broke Murray four times in his first five service games and Andy spent the rest of the time tryng to solve Mischa but never could.