The 24-time Grand Slam champion suffered his first ever defeat in a Shanghai final, having entered his clash with Sinner a perfect 4-0 in championship matches at the event.
Djokovic, who faced some knee issues in the quarters and semis in Shanghai, was pleased with how he performed against Sinner, and said he takes positives from his week overall.
“That gives me, I guess, reason to believe that I can still play with these guys that are best in the world at this level,” said the 37-year-old.
“Hopefully I can maintain that level in the upcoming months, and also for the future.”
His runner-up showing has moved him up to No.6 in the ATP Race to Turin. Still seeking qualification, Djokovic is a seven-time ATP Finals champion, and has won the event the last two years.
“My main motivation comes from love and passion for the sport, and also the desire to keep competing. These are kind of the matches and challenges that I still strive for, to be in a position to play against the best players in the world, on the biggest stage, in the finals of some of the biggest tournaments in the world,” said Djokovic, whose sole title this year came in sensational fashion at the Olympic Games in Paris.
“I don't know what the future brings, I'll just try to kind of go with the flow to see how I feel in a given moment. I still plan to compete and play next season and, yeah, let's see how far I go.”