BELGRADE, Serbia — Novak Djokovic won't defend his ATP Finals title after ruling himself out Tuesday citing an injury, leaving the season-ending event without a member of the Big Three of men's tennis for the first time in 23 years. “I was really ...

Djokovic has won the ATP Finals, which is the end of year tournament somewhat seen as a fifth major, a record seven times. He won the title last year, beating current World No. 1 Jannik Sinner.

Novak Djokovic said on Tuesday he will miss the eight-man ATP Finals in Turin due to an "ongoing injury". "I was really looking forward to being there, but due to ongoing injury I won't be playing next week," Djokovic said on social media.