ASTANA, Kazakhstan (AP) — Novak Djokovic didn't play as well in his Astana Open quarterfinal on Friday as he did in the first two rounds.
"Still, it was enough," Djokovic said after beating Karen Khachanov 6-4, 6-3.
"I managed to produce some good tennis when it was the most needed."
Djokovic conceded a 3-0 lead but broke Khachanov for the first set with a backhand volley. He broke Khachanov for 3-1 in the second and finished their quarterfinal with an ace.
Daniil Medvedev awaits in the semifinals. Medvedev has a 4-6 win-loss record against Djokovic, and they haven't met since the Paris final last November, when Djokovic won in three sets.