The Australian Open semifinal match between Novak Djokovic and Alexander Zverev came to a shocking conclusion late Thursday night for fans watching in the United States when Djokovic retired due to injury after a thrilling first set.
Djokovic and Zverev played to a tiebreak in the opening set of what had all the makings of a five-set classic, and by the time Zverev took the tiebreak 7–5, 82 minutes had passed.
