India, Oct. 19 -- The year-ending ATP Finals, to be played in Turin, surprisingly still has five slots to fill, and a big focus is on whether 24-time Grand Slam champion Novak Djokovic will make it to the prestigious eight-player tournament from November 15 to 22. Germany's Alexander Zverev, enjoying a breakout year in which he won his first two Grand Slams, seven-time major champion Carlos Alcaraz of Spain and American world No.4 Ben Shelton have secured their spots. Italy's five-time Slam winner Jannik Sinner, who was the first to qualify, will miss out after ending his season early due to a lingering knee injury.

The Italian secured his place by reaching the Wimbledon final, where he beat Zverev. However, earlier this month, Sinner an...