TURIN, Italy (AP) — Novak Djokovic beat Stefanos Tsitsipas for the ninth straight time by 6-4, 7-6 (4) in the players' opening match at the ATP Finals on Monday.
Djokovic has beaten Tsitsipas in his third straight tournament following wins in Astana, Kazakhstan and at the Paris Masters.
"All the matches we've played have been decided by two or three points and that was again the case tonight," Djokovic said.
He broke Tsitsipas in the opening game and held from there to close out the first set.
"A break in these conditions is decisive," Djokovic said of the fast indoor court.