ASTANA, Kazakhstan (AP) — Novak Djokovic survived a second-set tiebreaker in the Astana Open semifinals and shortly after his opponent Daniil Medvedev retired with a leg injury on Saturday.
Djokovic advanced at 4-6, 7-6 (6). He will play third-seeded Stefanos Tsitsipas in Sunday's final.
"I really hope that his injury is nothing too serious," Djokovic said. "I know Daniil, he's a great guy, he's a fighter, he's a big competitor. . . . He told me that he pulled an adductor muscle in his leg.
"It was such a close match, particularly in the second set. I would probably say he was a better player on the court in both sets. I was fighting and trying to find a way. I found a way to win the second, but I'm just sad for the tournament and for these people who were enjoying the battle, and for Daniil that it had to end this way."
Going in to the match, Medvedev had a 4-6 win-loss record against Djokovic, and they hadn't met since last November in the Paris final, where Djokovic won in three sets.