Novak

Novak Djokovic undergoes shoulder surgery

Novak Djokovic drops from top-four in ATP rankings

Australian Open: Djokovic knocked out in 2nd round by 117th-ranked Istomin

Djokovic beats Murray to defend Qatar Title

Andy Murray beats Djokovic to win ATP Finals title

ATP Finals: Novak Djokovic, Andy Murray face-off for No. 1 ranking

RECORD: Andy Murray to be oldest first time World No. 1 since 1974

Novak Djokovic retains top spot in ATP rankings

IN PICS: Best Moments Of 2016 US Open Final Between Novak Djokovic And Stan Wawrinka

US Open 2016: Stan Wawrinka wears down Novak Djokovic for 3rd Grand Slam title

US Open 2016 Final: Novak Djokovic vs Stan Wawrinka

US Open 2016: After 'strange' win; Novak Djokovic to face Stan Wawrinka in final