In a stunning development at the Australian Open, an injured Novak Djokovic withdrew after losing the first set of his semifinal match versus Alexander Zverev.
Zverev, the No. 2 seed, won a grueling first set in a 7–6 tiebreaker that lasted one hour and 26 minutes. No. 7 Djokovic decided he couldn't continue with a left leg injury that was hindering him throughout the match. The 10-time Australian Open champion revealed afterward that the injury was a muscle tear.
As soon as the set ended, Djokovic put his thumb up and conceded the match. Zverev looked shocked and the very pro-Djoker crowd at Rod Laver Arena was hushed in disbelief.