SHANGHAI, China (AFP) — Novak Djokovic battled through “an incredible fight” with Taylor Fritz on Saturday, shrugging off physical discomfort to set up a Shanghai Masters final with world number one Jannik Sinner where he will look to secure his 100th career title.

Djokovic saw off Fritz 6-4, 7-6 (8/6) after Sinner had beaten Tomas Machac 6-4, 7-5, ensuring in the process that he will finish the year at the top of the rankings.

“It feels like destiny to fight for a 100th title here in a place where I’ve had great success in the past, where I have tremendous support,” said four-time Shanghai champion Djokovic.

Only Jimmy Connors (109) and Roger Federer (103) have previously broken through the 100-title barrier in the men’s game.

“I won’t be a favourite on the court, but hopefully I’ll be able to come out physically fresh enough to challenge him for what may be a long match,” added Djokovic of Sunday’s final.

“I have to expect probably the toughest encounter of the tournament, and I have to be ready for it.”

Sinner said playing Djokovic would make the final “even more special”.

“It’s going to be a very tough one, it’s one of the biggest challenges we have in our sport,” he said.

Djokovic has now beaten the United States’ Fritz at each of their 10 encounters.

The Serb broke the 26-year-old US Open finalist in the fifth game to win the first set in 38 minutes.

But the second set lasted twice as long, and was a much more tense affair, as the players sent each other scrambling across the court in a series of thrilling rallies.

The 24-time Grand Slam champion called it an “incredible fight”.

“He could have easily won the second set… In the tiebreak it was really anyone’s game, [but] I feel like I was never giving up,” Djokovic said.

In the second set, after an almost 13-minute fifth game eventually held by Fritz, Djokovic bent over in exhaustion, breathing heavily.

The world number seven missed a good chance in the eighth game when he failed to convert a break point, with Djokovic recovering to hold.

“I just never really came up with what I needed to come up with in a lot of big moments and the big points,” said the American.

Djokovic came from 3-5 down in the tiebreak to level and then win after three unforced errors from Fritz.

The 37-year-old, who has been wearing a brace on his right knee and has been having trouble with his left one too, had to take a medical time-out for his left leg towards the end of the second set.

However, he said after the match none of the issues were serious.

After physio, “I could move freely and run and sprint, which is good news”, he said.

“I guess at this age you kind of have to expect that each match something different happens physically.”

The 23-year-old Sinner has been top of the world rankings since June and after his ruthless semi-final victory will stay there until at least the end of the season, the first Italian to do so.

“It was only a dream just to become number one…Now finishing [the year there] is also a different feeling,” the Italian said.