Nick Kyrgios’ girlfriend Costeen Hatzi showed off her stylish and elegant fashion sense at the 2025 Brisbane International as she cheered on her boyfriend during a men’s doubles match. The 24-year-old influencer looked chic in a black sleeveless top and white trousers accessorized with a gold watch, diamond earrings, and cat-eye sunglasses. Kyrgios has credited Hatzi as a source of inspiration both on and off the court. The couple has been together since 2021, and their high-profile relationship has garnered a lot of attention.
Hatzi has been a popular figure on social media since she started dating tennis pro Nick Kyrgios three years ago. She often accompanies him to tournaments around the world, showcasing her role as his biggest cheerleader. With her flawless style, she has become a social media star in her own right, working with top brands and earning money through sponsored posts. Despite her current success, Hatzi admitted that her fashion sense has evolved over the years, attributing her style inspiration to celebrities like Hailey Bieber and her use of Pinterest.
When Hatzi started dating Kyrgios, she was studying and working at a car dealership before transitioning to a full-time influencer. She graduated from the Australian Catholic University with a Bachelor of Psychology and now runs her business, Style Studio Dress Hire, in addition to supporting Nick’s tennis career. The couple recently celebrated their third anniversary, having met through Instagram in 2021. Before dating Hatzi, Kyrgios was in a long-term relationship with Chiara Passari until they split in February 2021.
Hatzi’s fashion evolution has been influenced by celebrity fashionistas like Hailey Bieber and her own experimentation with different styles. She previously wore cropped shirts, pleather trousers, and neon tones before finding her signature elegant evening wear. Despite not always having a strong sense of fashion, Hatzi has now established herself as a fashion icon on social media, earning between four and five figures for each sponsored post. Her transformation into a stylish and sophisticated influencer has been a significant journey for her since she began dating Kyrgios.
