Roundup: Djokovic prevails, Jabeur knocked out in Australian Open

MELBOURNE, Jan. 19 (Xinhua) -- Novak Djokovic overcame persistent hamstring issues, heckling from fans and pesky French qualifier Enzo Couacaud on Thursday to reach the Australian Open third round, but women's second seed Ons Jabeur crashed out.

On a dramatic day four, where several high profile men's players were eliminated, Djokovic defied the obstacles to thwart 190th-ranked Couacaud 6-1, 6-7 (5), 6-2, 6-0 in