Djokovic taking hamstring injury ‘day to day’ as he progresses in Melbourne

Speaking to Eurosport afterwards, the 35-year-old said of the hamstring: 'To be honest, it is not good at all. I will take it day to day.'

Novak Djokovic stretches out his injured leg (Dita Alangkara/AP)

Novak Djokovic admitted he is worried about his Australian Open prospects after his left hamstring problem flared up again during a second-round victory over Enzo Couacaud.

Djokovic took a medical timeout during the second set and appeared distinctly uncomfortable, grimacing and stretching, but he avoided joining Rafael Nadal and Casper Ruud in making an early exit, coming through 6-1 6-7 (5) 6-2 6-0 to set up a clash with Grigor Dimitrov.