Novak retires from semifinal against Zverev due to injury
Novak Djokovic retired from the Australian Open semi-final match with Alexander Zverev due to a left thigh injury, ending his quest for a 25th Grand Slam title.
Novak makes confident start in Melbourne
Defending champion is through to the second round of the Australian Open with a comfortable 6-2, 6-4, 7-5 win over Frenchman Paul-Henri Mathieu in 1 hour and 42 minutes.