Jannik Sinner's rumoured girlfriend was caught on camera cheering on the tennis superstar during his US Open semi-final win.

Putting on a show in front of Laila Hasanovic, Sinner beat Felix Auger-Aliassime over four sets to book his spot in the final against Carlos Alcaraz.

Hasanovic, who dated Formula 1 driver Mick Schumacher for two years, jetted into New York to support Sinner, and her presense caused a buzz on social media.

One account took a screenshot of the live coverage after the cameras flashed across to the model sitting up in the stands, applauding Sinner after he won a point.

She was also spotted in his box at both Roland Garros and Wimbledon this year. 

It was recently revealed that Sinner was able to charm Hasanovic in unusual fashion thanks to their shared love of ice cream - and that they were indeed dating.

According to Corriere dello Sport, Roberto and Nicoletta Stampfl, owners of an ice cream shop in Monte Carlo, confirmed the relationship.

Ms Stampfl said: 'Sinner and Laila live in the La Condamine neighborhood of Monte Carlo. Our shop is under their building. I really liked Laila, she's kind, just like Jannik.

'She's beautiful, very simple in the way she carries herself and dresses. In short, she's a very down-to-earth girl. 

'Sinner knows [a lot] about [ice cream] when he comes here, he tastes before deciding. But in the end, he always chooses pistachio and black cherry, his favourite.' 

Sinner had previously dismissed suggestions of a romance despite reporters claiming he had been seen on a date with Hasanovic in Copenhagen, insisting: 'No, no, there was no girl. I had just some business with a couple of photo shootings there.

'That's it. Nothing else.'

However, after a zoomed-in photo allegedly showed a photo of Hasanovic as his phone screensaver, his followers became unconvinced he was single. 

This comes despite Sports Illustrated model Brooks Nader dropping a huge hint that she is dating a tennis player after being questioned on rumours linking her with Sinner during an appearance on Jimmy Kimmel earlier this week. 

Nader's sister sparked speculation the pair are seeing each other by revealing that an athlete whose name 'rhymes with winner' had DMd her days before the 28-year-old was pictured at the US Open in New York last Sunday. 

The talkshow host showed Nader a picture of her in the stands alongside Stephen Colbert, before asking her outright if she is dating Sinner.

'Is this like, an interrogation?' Nader said, after Kimmel joked she is 'under oath'. 'I'm so scared right now! Oh my god. Ask Stephen what match we were at. 

'I don't think he was playing in that one. You're close, you're warm.' 

Kimmel responded: 'Oh, I see. So it's somebody else?' 

Nader didn't confirm or deny that she is dating a different tennis superstar. She simply responded once again: 'You're warm but we weren't at that match.'

Sinner was previously in a relationship with fellow tennis player Anna Kalinskaya, who herself had dated Nick Kyrgios, and later linked with Russian model Lara Leito, a former partner of Oscar-winning actor Adrien Brody.