Novak Djokovic celebrates his Japan Open victory over Australian John Millman.
World number one Novak Djokovic clinched the Japan Open on Sunday, dispelling concerns about the shoulder injury that forced him out of the US Open.
It was also the 10th time in Djokovic's career that he won the title in his debut appearance at a tournament.
On how he motivates himself, the 16-time Grand Slam victor said: "The main source of motivation has to come from inside, rather than external. Everything is positive in my experience on and off the court, the way I feel and motivated for Shanghai, going there with great confidence", he said.
"Obviously the key was to try to fight off the resistance early in the match because he didn't have much to lose playing finals from qualifications", Djokovic said.
The second set was even more dominant as Djokovic broke his opponent twice to go up 3-0 then held serve the rest of the way.
It was his first competition since pulling out of the US Open due to a left shoulder injury.
Djokovic fired six aces, never committed a double fault, and scored points on 26 of his 30 successful first serves.
Djokovic has been widely touted to join rival Roger Federer in the Olympics line-up, where they are expected to go toe-to-toe for possibly the last time depending upon Federer's retirement plans. "Like Davis Cup and Olympics, I am aware of being a representative of my native country in tournaments". The only players ahead of him are Daniil Medvedev (54) and Rafael Nadal (48).
Meanwhile, Naomi Osaka rallied to come from a set down to beat World No.1 Ashleigh Barty in an enthralling China Open final.
In the men's final, top-seeded Austrian Dominic Thiem faces Greece's Stefanos Tsitsipas.