Romeo Beckham's rumoured ex Caroline Daur watches on as new boyfriend Alexander Zverev competes at the Australian Open

Caroline Daur proudly watched on as her new boyfriend Alexander Zverev celebrated his victory in the Men's Singles quarter-final match on day ten of the Australian Open on Tuesday. 

The German model, 30, who was previously linked to Romeo Beckham, looked in good spirits as she cheered on the tennis pro, 28. 

Caroline, who made a name for herself in recent years as a fashion blogger under the name Caro Daur, opted for a dark brown blazer and a matching mini skirt.

The beauty also wore a white sleeveless top and accessorised with a pair of hoop earrings as she enjoyed the Open.

Alexander, the current world No. 3, defeated Learner Tien of the United States in the quarter-final. 

Caroline and Alexander debuted their new romance when she arrived in Sydney with him for the Open earlier this month.

He was previously in a relationship with German actress and model Sophia Thomalla.

Caroline enjoyed a night out with Romeo Beckham in June of last year, shortly after his split from Kim Turnbull. 

Romeo was seen leaving a bash at Hotel Costes in Paris with the stunning influencer.

The model jumped into a car with Caroline and other pals after enjoying an evening together, keeping the fun going as they went on to party Julia nightclub in the French capital into the early hours. 

A source told MailOnline of the outing: 'Romeo was in town for work meetings, Roland Garros and also caught up with friends. He had dinner with his three friends one of whom is great friends with Caro so she joined the group. It was a casual dinner in a group setting throughout the evening.'

Romeo and Kim ultimately rekindled their romance in October. 

His mother Victoria has long been a fan of Caroline's and in 2018 her Facebook page reposted a snap of Caroline wearing one of her designs. 

Caroline has also attended several of Victoria's fashion shows.  

She is proud of the fact she is 'self-made', previously stating: 'I don't have an agent, manager or assistant. I do everything by myself.'

Caroline - who studied business in school - worked for a headhunting company while building up her brand but is now a full-time influencer and model with a net worth of €4 million. 

By 2016 she had become the first German blogger to achieve more than one million Instagram followers and went on to land the cover of Japanese Vogue as well as walking for Dolce & Gabbana during Milan Fashion Week.

Caroline also started branching out into other forms of media, appearing as a guest judge on Germany's Next Top Model, and launching her own series of online workout videos. 

In 2019, Caroline - who is the daughter of lawyer Harald and manager Monika - was mentioned in Forbes 30 Under 30 list. 

The blogger previously revealed that she only sleeps four to five hours a night because her mind 'is always somewhere', and this year revealed she'd been diagnosed with ADHD.

Detailing her diagnosis, she said: 'It didn't surprise me – and it didn't surprise anyone around me either. The diagnosis came late, but it explained so much.

'My brain is like an internet browser with 47 tabs open. Sport is the only way I can calm it down. This morning I worked out at 7am, even after a short night. Without it, I just don't function.'

Of her ability to make it as a blogger, she mused: 'My success came from consistency and treating my work seriously. I didn't just smile in front of the camera – I planned, negotiated, edited, and built a business.'