Nole will defend 720 ATP points in New York where he lifted his first US Open trophy in 2011. Last year he finished semifinalist to Kei Nishikori, 4-6, 6-1, 6-7, 3-6.
Novak improved to a perfect 24-0 record at the China Open last year after he won a record fifth Beijing title with a 6-0, 6-2 victory over Tomas Berdych in the final.
Novak won the Shanghai Rolex Masters trophy twice (2012-13). In 2014, he finished semi-finalist to Roger Federer (4-6, 4-6).
Novak is going back to Paris where he won titles in 2009, 2013 and 2014. In the last year's final, he defeated Canadian Milos Raonic 6-2, 6-3.
Last year Nole won the ATP World Tour Final on a walkover after Roger Federer pulled out ahead of their match. Djokovic will be looking to become the first player to win the year-end championship four times in a row.