Costeen Hatzi and Nick Kyrgios began dating in December 2021, according to People (celebrity news outlet). By May 2025 she had announced their separation, turning a new page from WAG to entrepreneur.

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Instagram followers: 172,000 · Relationship duration with Nick Kyrgios: Late 2021 – early 2025 · Separation announced: May 2025 · Founded: Style Studio (dress-hire company, Sydney) · Management: The Ministry of Talent

Quick snapshot

1Who is Costeen Hatzi?
2Relationship with Nick Kyrgios
3Career Highlights
4Social Media Presence
  • Instagram: @costeenhatzi
  • Posts about fashion, lifestyle, and personal updates
  • Contact for collaborations through her management

Six key personal and professional identifiers paint a clear picture of Costeen Hatzi’s public profile:

Attribute Detail
Full name Costeen Hatzi (Instagram)
Nationality Australian
Occupation Influencer, entrepreneur (Now To Love)
Known for Being girlfriend of Nick Kyrgios, founding Style Studio
Instagram @costeenhatzi (172K followers) (Instagram)
Management The Ministry of Talent

What happened with Nick Kyrgios and Costeen Hatzi?

The split announcement

Costeen Hatzi announced their separation in May 2025 after months of speculation. Rumours that the couple had split first gained traction in April 2025 following cryptic social-media activity, People reported. Kyrgios publicly addressed the breakup on June 11, 2025, during an Instagram Q&A, saying: “Things happen. I wish her nothing but the best.”

Things happen. I wish her nothing but the best.

— Nick Kyrgios, Instagram Q&A, June 2025 (via People)

Their relationship timeline

  • Late 2021: Hatzi and Kyrgios begin dating after she sold him a mirror through social media (Yahoo Entertainment / The Daily Telegraph summary (news aggregation)).
  • Early 2023: Engagement speculation after a social-media post joked “Our wedding soon” (Times of India (Indian news outlet)).
  • 2022–2024: The couple moved in together and Hatzi became a full-time member of Kyrgios’ support team, attending tournaments around the world (The Express).
  • March 2025: A TikTok clip posted by Hatzi on March 29 intensified breakup speculation (People).
  • May 2025: Hatzi confirms separation on social media.
  • August 2025: Hatzi gives an interview revealing she “cooked, washed for Nick Kyrgios” and said she had “no regrets” (The Express).
The trade-off

Hatzi was a hands-on partner who described her role as “fully supportive.” But that daily intimacy, from cooking to washing, also meant the breakup left her with a sudden personal void — one she filled by launching her own business.

What Hatzi said about the breakup

In a later interview with The Express (UK sport and news outlet), Hatzi said she had not spoken with Kyrgios after the split and believed “relationships come to an end.” She said she was focusing on work and content, adding that life after the breakup had been “good.”

Bottom line: The implication: Hatzi has chosen to move forward without bitterness, publicly refusing to “ruin his name” while quietly building her own brand.

What does Costeen Hatzi do for a living?

Social media influencer

Hatzi’s primary income stream is social media influencing. Her Instagram account @costeenhatzi has 172,000 followers, where she posts about fashion, lifestyle, and personal updates. Her bio lists professional contact details through her management firm, The Ministry of Talent (Instagram (social media platform)).

Founder of Style Studio

In 2023, Hatzi launched Style Studio Dress Hire, a Sydney-based business that rents out designer dresses. The Australian Business Register lists an active ABN for “COSTEEN HATZI ENTERPRISES PTY LTD & SEVAKOS GROUP PTY LTD” from March 2, 2023 (Australian Business Register (government registry)). Yahoo Entertainment confirmed the launch in 2023 (Yahoo Entertainment).

Brand collaborations

After the breakup, Hatzi continued working on brand partnerships. She told Yahoo Entertainment that life has been “good” and that she is maintaining her content schedule (Yahoo Entertainment / The Daily Telegraph summary).

Why this matters

Hatzi monetised visibility gained from a high-profile relationship into a tangible business asset — a dress-hire company — that operates independently of Kyrgios. That’s a rare transition from WAG to founder.

How old is Costeen Hatzi?

Date of birth and age

Costeen Hatzi has not publicly disclosed her exact date of birth. Mainstream sources estimate she is in her mid-20s as of 2025. Famous Birthdays (user-generated biography site) lists an unverified birth year.

Early life and education

Hatzi stated in an interview that she was a university graduate “three years ago” (as of 2025). This suggests she completed her degree around 2022, placing her birth year in the late 1990s. No specific university or degree has been confirmed.

What degree does Costeen Hatzi have?

University education

Hatzi confirmed to The Express that she is a university graduate, though she has not named the institution or field of study.

Field of study

Details about her major or discipline remain private. No public records or interviews specify whether she studied business, fashion, communications, or another subject.

The pattern: Hatzi chooses to keep her educational background intentionally vague — a contrast to the full transparency around her relationship timeline.

How did Costeen Hatzi become famous?

Public relationship with Nick Kyrgios

Hatzi’s path to public recognition began when she started dating tennis star Nick Kyrgios in late 2021. The origin story — she sold him a mirror on social media — added a quirky, relatable hook that news outlets amplified (Yahoo Entertainment).

Social media growth

As Kyrgios’ partner, Hatzi gained exposure on his Instagram (which has nearly 3 million followers) and began building her own audience. She now leverages that platform to promote her business and lifestyle content.

Entrepreneurial venture

Instead of resting on her association with Kyrgios, Hatzi launched Style Studio in 2023, moving from influencer to founder. The dress-hire company taps into Sydney’s event-wear market and gives her a distinct professional identity beyond the “tennis WAG” label.

Bottom line: Costeen Hatzi is an Australian influencer-entrepreneur who used a high-profile relationship as a springboard to build a real business. For readers following celebrity-turned-entrepreneur stories, Hatzi’s trajectory from supporting partner to independent founder offers a concrete example of leveraging visibility into a separate income stream.

Timeline signal

  • Late 2021: Costeen Hatzi and Nick Kyrgios begin dating (People).
  • 2022–2024: Relationship continues; Hatzi becomes full-time member of Kyrgios’ team (The Express).
  • Early 2025: Couple reportedly splits.
  • May 2025: Hatzi announces separation on social media.
  • August 2025: Hatzi gives interview revealing she cooked and washed for Kyrgios – “no regrets” (The Express).

What’s confirmed and what’s unclear

Confirmed facts

  • Hatzi’s Instagram account and follower count (172K) (Instagram)
  • Her business Style Studio (ABN active from March 2023) (Australian Business Register)
  • Relationship timeline with Nick Kyrgios (late 2021 – early 2025) (People)
  • Split announced in May 2025
  • Her management by The Ministry of Talent
  • She was a university graduate three years ago (as of 2025) (The Express)

What’s unclear

  • Exact date of birth and age
  • Net worth
  • Reasons for the split
  • Current relationship status
  • Specific degree and university attended

I cooked, washed for Nick Kyrgios… no regrets, won’t ruin his name.

— Costeen Hatzi, interview with The Express

For Hatzi, the move from WAG to independent founder is just beginning. The real test will be whether she can build Style Studio into a lasting brand beyond the headlines. For followers of celebrity entrepreneurs in Australia, the lesson is clear: visibility opens doors, but only a real business keeps them open.

Additional sources

timesofindia.indiatimes.com, youtube.com, reddit.com, instagram.com

Like fellow Australian entrepreneur Tammy Hembrow, Hatzi demonstrates how a public split can fuel entrepreneurial reinvention.

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Frequently asked questions

How many Instagram followers does Costeen Hatzi have?

She has 172,000 followers on Instagram (@costeenhatzi).

What is Style Studio?

Style Studio is a Sydney-based dress-hire company founded by Hatzi in 2023 (Yahoo Entertainment).

Is Costeen Hatzi on Wikipedia?

No, she does not have a Wikipedia page.

Did Costeen Hatzi play tennis?

No, she is not a tennis player. She was the partner of tennis star Nick Kyrgios.

Where is Costeen Hatzi from?

She is Australian, based in Sydney (Now To Love).

What was Costeen Hatzi’s role in Nick Kyrgios’s career?

She was a supportive partner, attending tournaments and managing household duties during the tennis season (The Express).

Does Costeen Hatzi have children?

No public information suggests she has children.

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