Djokovic struggles as Federer coasts
Novak Djokovic, the defending champion, survived a scare against Gilles Simon to reach the last eight of the Australian Open in Melbourne. Five-time champion Djokovic made an uncharacteristic 100 unforced errors, but prevailed 6-3, 6-7 (1-7), 6-4, 4-6, 6-3 after four hours and 32 minutes on...