Novak Djokovic advanced to the third round of the Shanghai Masters by beating Grigor Dimitrov of Bulgaria 6-3, 6-2 on Wednesday.
The second-seeded Djokovic won the China Open in Beijing last week for his fourth title of the year and 32nd of his career. He has now won 66 matches this season, the most of any player on tour.
Djokovic didn't offer Dimitrov a break-point opportunity and never lost more than one point in any service game. He also served four games at love.
"Very pleased with my serving in Beijing and obviously the first match today," Djokovic said. "So that's something that I've been working on, obviously. Relying on the serve in today's tennis is a big advantage. So I try to get as many free points as possible. It helped me a lot to defeat my opponent."
If Djokovic wins in Shanghai and Roger Federer loses before the quarterfinals, the Serb would reclaim the No. 1 ranking next week.