Sam Querrey 2-0 up against Djokovic! Close to Upset?

Friday was a tough day in the office for Serb. Novak Djokovic is 2 sets down against Sam Querrey and is expected to continue match tomorrow. Is it possible that tall American comes up with an upset? Lucky Djokovic was saved by rain delay. The same situation happened last year. He was set sets down against Kevin Anderson saved by rain and came back to win 4th round and then title. Can he pull it again tomorrow or will Sam serve it out? Anticipation awaits…..