Nick Kyrgios’ girlfriend Costeen Hatzi turned heads on Wednesday as she stepped out in style to support her tennis star boyfriend at the 2025 Brisbane International.
The glamorous tennis WAG, 24, exuded timeless elegance while seated courtside, cheering on Kyrgios as he joined forces with Novak Djokovic in a men’s doubles match against Michael Venus and Nikola Mekti.
Hatzi flaunted her impeccable fashion sense in a chic black sleeveless top, which showcased her flawless skin and trim figure, paired with crisp white trousers.
She accessorised her look with a gold wristwatch, diamond earrings, and trendy cat-eye sunglasses which added a touch of sophistication.
Her straight brunette hair completed the polished ensemble, making her one of the most fashionable spectators at the event.
Kyrgios has credited Hatzi as a source of inspiration both on and off the court.
Nick Kyrgios’ girlfriend Costeen Hatzi (pictured) turned heads on Wednesday as she stepped out in style to support her tennis star boyfriend at the 2025 Brisbane International
The glamorous tennis WAG, 24, exuded timeless elegance while seated courtside, cheering on Kyrgios as he joined forces with Novak Djokovic in a men’s doubles match against Michael Venus and Nikola Mekti
Hatzi has often been seen accompanying Kyrgios to tournaments around the world, showcasing her role as his biggest cheerleader.
The glamorous influencer rose to fame three years ago when she began dating tennis pro Nick, 29, and has now become a hugely popular social media star in her own right.
She has worked with a wide array of top brands and even walked in her very first runway show at the Hunting Hue launch in Sydney in October in a major milestone.
Now well-known for her flawless style, Hatzi also rakes in between four and five figures for each of her sponsored posts as she makes a living off her wardrobe.
However, it has been quite the journey for Hatzi as she admitted she hasn’t always had the same eye for fashion while speaking exclusively to Daily Mail Australia.
Several years ago, she instead could be seen sporting cropped shirts, pleather trousers and neon tones, rather than the elegant evening wear she is now known for.
‘Maybe like three years ago when I started seeing Nick, I didn’t know what styles worked for me and I got photographed in not the best clothes,’ she admitted.
Hatzi showcased her impeccable fashion sense in a chic black sleeveless top, which showcased her flawless skin and trim figure, paired with crisp white trousers
The glamorous influencer rose to fame three years ago when she began dating tennis pro Nick Kyrgios (right) and has now become a hugely popular social media star in her own right
The Sydney-based businesswoman said celebrity fashionistas including Hailey Bieber have heavily influenced her fashion evolution, as well as her regular use of Pinterest.
She shared: ‘Hailey Bieber, I love what she wears, she’s such a style icon. I feel like every young girl would say Hailey Bieber.’
Hatzi didn’t start her career in fashion but was studying and working at a car dealership before meeting Nick, when she launched her career as a full-time influencer.
She graduated from the Australian Catholic University with a Bachelor of Psychology in May 2021, and now runs her business Style Studio Dress Hire as well as supporting Nick’s tennis career.
She has been dating Nick since 2021, when they met via Instagram, and the couple recently celebrated their third anniversary.
Their high-profile relationship came nearly a year after Nick split from his long-time girlfriend Chiara Passari in February 2021.
