MELBOURNE, Jan ‌25 (Reuters) - Novak Djokovic advanced to the quarter-finals of the ‌Australian Open after his fourth-round opponent Jakub Mensik withdrew ‌with an abdominal injury on Sunday, a day before they were scheduled to face off at Melbourne Park.

Czech 16th seed Mensik came through a tight third-round ‍clash against American, Ethan Quinn, with a ‍6-2 7-6(5) 7-6(5) win on ‌Saturday, but the 20-year-old said he had been carrying an injury ‍that ​prevented him from facing his mentor Djokovic.