Costeen Hatzi, girlfriend of tennis star Nick Kyrgios, made a stylish appearance at the 2025 Brisbane International on Wednesday, supporting Kyrgios during his men's doubles match with Novak Djokovic. The 24-year-old influencer looked effortlessly chic in a black sleeveless top and white trousers, accessorized with gold jewelry, diamond earrings, and cat-eye sunglasses. Her sleek, straight hair completed the polished look. Kyrgios later posted on Instagram celebrating their three-year anniversary, adding a crown emoji alongside a photo of the couple, hinting at her special place in his life.
Hatzi's elegant courtside appearance highlighted her evolving fashion sense, a journey she has previously discussed. While she now commands four to five-figure sums for sponsored posts and boasts a wardrobe envied by many, Hatzi admits her style has undergone a transformation. Citing Hailey Bieber as a major influence, along with Pinterest, Hatzi has moved away from the cropped shirts, pleather trousers, and neon tones of her past, embracing a more sophisticated aesthetic.
Her relationship with Kyrgios, which began in 2021 after they connected on Instagram, recently reached its three-year milestone..In addition to her influencer work, Hatzi runs the business Style Studio Dress Hire and holds a Bachelor of Psychology degree from Australian Catholic University.
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