Tennis: Djokovic hints he could have played his last Australian Open [SOUND]

# Tennis: Twenty-four-time Grand Slam champion Novak Djokovic has confirmed that he has a muscle tear on his upper left leg, after retiring from the Australian Open semifinal match against Alexander Zverev. The Serb, who was bidding for a record-extending eleventh title in Melbourne, retired injured after losing the first set 7-6 against the German. Djokovic says there is a possibility this was his last Australian Open: