 The nine-time champion Novak Djokovic on Thursday survived an injury scare to reach the third round of the Australian Open, beating Frenchman Enzo Couacaud here at Rod Laver Arena, here. The 35-year-old, struggling with his left leg, edged past Couacaud 6-1, 6-7(5), 6-2, 6-0 in three hours and four minutes.