21 : 55 IST : Federer holds on to serve and thanks to Djokovic the Swiss steamed away to win the fourth set 7 - 5 .
Djokovic missed a backhand pass and made a double fault .
21 : 55 IST : Federer holds on to serve and thanks to Djokovic , who missed a backhand pass and made a double fault , the Swiss steamed away to win the fourth set 7 - 5 .