Novak Djokovic expressed his relief at reaching the Shanghai Masters final, saying his win over Taylor Fritz pushed him to his limits on Saturday. 

Djokovic kept his hopes alive of claiming a 100th tour-level title with a battling 6-4 7-6 (8-6) triumph over the American after overcoming a hip issue at the end of the second set. 

The 37-year-old required a medical timeout in the closing stages of his almost two-hour-long battle but returned to the court to reach his fifth showpiece match in Shanghai. 

In doing so, Djokovic surpassed Andy Murray (four) for the outright most finals reached at the event, while also extending his unbeaten run against Fritz to 10 matches. 

But the 24-time grand slam champion acknowledged the challenges he faced against Fritz, who threatened to take the encounter the distance. 

"It always takes it out of me, these kinds of battles, but particularly towards the end of the tournament," said Djokovic.

"At this stage of my career, I’m doing my best to recover, and I had some issues here and there on the court, physically, yesterday and today. But I managed to overcome it.

"It was a stern test. Taylor is in form, playing probably the best tennis of his life coming off a grand slam final, and he's playing really well, particularly on this surface.

"He's serving big, so I knew it was going to be a big test for me. I did not want to get to a third set, and I'm just glad to overcome in two.”

The Serbian's victory set up a meeting with world number one Jannik Sinner, who beat Tomas Machac 6-4 7-5 in the other semi-final.

It will be the pair's first meeting since their final four clash at the Australian Open earlier this year, a contest Sinner would go on to win his maiden grand slam title. 

But having performed well at his first tournament since his US Open exit, Djokovic is hoping to join Jimmy Connors and Roger Federer in the 100 club against a player he described as "the best in the world."

"I came to Shanghai after five years of not playing in China, the place where I've always had great success, both in Shanghai and Beijing," said Djokovic.

"[I've won] many titles, had great battles and great performances. I’ve said it many times, the support that I get here is tremendous, and I'm very grateful.

"That creates an energy that keeps me going, keeps me running, so I did come here definitely with a vision and a desire to get to the final and fight for a 100th title.

"I get that chance against the best player in the world, and let's see what happens."