Istomin played well , His pace for serving and returning was very fast and this strategy worked thru the first set into the 2nd set when Djokovic broke serve and held for 6-4, Djokovic missed by inches on several shots, the decider happened in 30-0 when djokovic hit backhand extreme cross court angle, Istomin challenged, in by an inch,,40-0, then 40-15, then finished the match with an ace,,Istomin would not go away in this match,,R8-round of 8 for Djokovic, Great mental win and come back for Djokovic,,I would not count the other players out,Djokovic needs to up his game,,the others will be upping theres. As too the announcers, they need to get a life,,they were bouncing around prepping words for Djokovic loss, they were like stock brokers buying long and selling short to prevent a loss on them. Federer may buy pizza for ball boys and girls,,Djokovic dances with them in his wig.