Novak Djokovic retired due to injury after losing the first set to Alexander Zverev 7-6 (5) in the semifinals of the ...
Spectators booed as the 37-year-old Djokovic walked off toward the locker room, and he stopped, turned around and responded ...
Novak Djokovic vs Alexander Zverev, Australian Open Highlights: The first set went on for more than an hour and Djokovic was ...