Novak Djokovic said the level of pain was not enough to force him to retire from his match against Chung Hyeon. Mast Irham / EPA
Novak Djokovic said the level of pain was not enough to force him to retire from his match against Chung Hyeon. Mast Irham / EPA

Australian Open: Beaten Djokovic feels the need to 'reassess' level of fitness after defeat to Chung