Novak Djokovic is out of the Australian Open in stunning fashion. The 24-time slam champion medically retired immediately after dropping the first set of his semifinal match against No. 2 Alexander Zverev in a tiebreak 7-6 (5).

Zverev, who is seeking his first Grand Slam title, admonished the crowd a bit for the reaction during his on-court interview.From NFL plays to college sports scores, all the top sports news you need to know every day.

Twenty-four-time Grand Slam champion Novak Djokovic retired from his Australian Open semifinal match against Alexander Zverev on Friday afternoon, unable to continue due to a muscle tear in his left leg.