Former world number one Novak Djokovic suffered a surprising defeat by world number 58 Hyeon Chung in the fourth round of the Australian Open.
The 21-year-old South Korean defeated Djokovic 7-6, 7-5, 7-6 to
reach the quarter-final stage of a Grand Slam for the first time in his career.
Djokovic is the most successful player in the history of the tournament, having won six times in Melbourne.