Australian Open: Novak Djokovic forced to retire from semifinal
Novak Djokovic retired injured after losing a gruelling first set of his Australian Open semifinal to Alexander Zverev, leaving his bid for a record 25th Grand Slam crown in tatters on Friday. The 37-year-old Serbian great’s upper left leg was again heavily taped after he hurt it in the quarter-finals and he called time after going down 7-6 (7/5).