Jannik Sinner was not feeling perfect at the China Open, despite winning the title.

Sinner beat Learner Tien in the China Open final, enabling him to win his second title in Beijing and third of the year.

Despite it being a fairly routine straight sets victory, Sinner admitted there was something unusual about his victory in Beijing.

Sinner suffered a leg issue ahead of the final, but that was not the only thing that was bothering him in Beijing.

Jannik Sinner attends a press conference at the Shanghai Masters tennis tournament in Shanghai.Photo by JADE GAO/AFP via Getty ImagesJannik Sinner responds when asked about his stomach issue

Sinner was also impacted by stomach issues at the China Open, which he admitted after his semifinal win over Alex de Minaur.

With such a short turnaround after winning the China Open, just one day later Sinner was speaking in his pre-tournament press conference ahead of the Shanghai Masters, where he was asked about how his stomach was now feeling.

“Yeah, I feel good,” responded Sinner. “I said it before the final that I’m ready for the final, and so it was. Here, it’s different. It’s more humid, it’s hotter.

“I don’t know how it’s going to feel on court, but, you know, today I have one day where I can rest, and tomorrow I am going to have more feedback for my body and mind, and trying to prepare the first round match, then we’ll see how it goes.

“I’m looking forward to it. It’s a great challenge. You know, playing first round matches are never easy, so let’s see what’s coming, and hopefully I can show some good tennis here.”

Jannik Sinner’s potential run to the title at the Shanghai Masters

Sinner is the second seed at the Shanghai Masters this year, but he is actually the highest ranked player following Carlos Alcaraz’s withdrawal.

This means that there is a potential opportunity for Sinner to return to world number one this year, but first he has 1000 ranking points to defend as last year’s winner of the Shanghai Masters.

There are also some big threats in his half of the draw including Novak Djokovic, Taylor Fritz, Ben Shelton and Alexander Bublik.

Shanghai Masters 2025Jannik Sinner’s Potential DrawFirst RoundReceives a bye as the second seedSecond RoundDaniel AltmaierThird RoundTallon Griekspoor (27)/Jenson BrooksbyFourth RoundAlexander Bublik (14)/Tomas Machac (20)/Mattia Bellucci/Valentin VacherotQuarterfinalTaylor Fritz (5)/Holger Rune (10)/Ugo Humbert (21)/Giovanni Mpetshi Perricard (32)SemifinalNovak Djokovic (4)/Ben Shelton (6)/Casper Ruud (11)/Andrey Rublev (13)FinalAlexander Zverev (3)/Alex de Minaur (7)/Lorenzo Musetti (8)/Daniil Medvedev (16)

However, first for Sinner is a match against German player Daniel Altmaier, who actually beat him when they last played at Roland Garros in 2023.

Sinner will play his opening match in his Shanghai Masters title defence on Friday, October 3.