MELBOURNE, Australia (AP) — An injured Novak Djokovic quit after dropping the first set of his Australian Open semifinal against Alexander Zverev on Friday.

Percentages: FG .397, FT .826. 3-Point Goals: 9-18, .500 (Clouet 4-8, Dahlke 2-3, Beniwal 1-1, Brooks 1-1, Pierre 1-2, Duckett 0-1, Gaffney 0-1, Muncey 0-1). Team Rebounds: 4. Team Turnovers: None.