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Marta Kostyuk clenching her fist on court
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WTABest WTA ranking No. 16

Marta Kostyuk

UKR24 yrs5' 9" (1.75 m)

Best WTA ranking No. 16

Australian Open junior champion at 14, now a WTA top-20 player.

Plays
Right-handed, two-handed backhand
Coach
Sandra Zaniewska

Figures as of 30 September 2026.

Profile & career

A player destined for tennis.

Marta Kostyuk grew up in the game: her father, Oleh, was the technical director of a junior tournament in Kyiv, and her mother, Talina, is a former professional who reached world No. 391 in the 1990s. She started playing at 5 and quickly stood out in the youth categories, winning the Orange Bowl and Les Petits As, then the Australian Open junior title at 14, on her way to world No. 2 in the junior rankings.

One of the most promising players on the WTA Tour, she won her first title in Austin in 2023 and broke into the top 20 in May 2024, where she has stayed since. Her best Grand Slam result came in Melbourne, with a quarter-final in 2024.

Did you know?In her very first junior Grand Slam, she won the 2017 Australian Open at the age of 14.

Marta Kostyuk in a red dress walking back between points

GRAND SLAMS

Marta & the Grand Slams.

A first Grand Slam quarter-final in Melbourne in 2024.

Australian OpenHard courtBest resultQuarter-final2024
Roland-GarrosClay courtBest resultLast 162021
WimbledonGrass courtBest result3rd round2023, 2024
US OpenHard courtBest result3rd round2020, 2024

CAREER

Titles, year by year.

Marta Kostyuk turned professional in 2018 and reached the third round of the Australian Open at 15, where she was soundly beaten by her compatriot Elina Svitolina, then in the top 5. After a period of inconsistent results, she climbed the rankings and 2024 was her breakthrough year: a first WTA 1000 semi-final at Indian Wells, a quarter-final at the Australian Open, lost in three sets to Coco Gauff, and a ranking of world No. 16 in June. She has beaten players such as Gauff, Pegula, Zheng, Mertens, Svitolina and Vondroušová. She won her first final on the tour in Austin in March 2023, beating Varvara Gracheva 6-3, 7-5, and in 2024 reached two WTA 500 finals, in San Diego against Katie Boulter and in Stuttgart against Elena Rybakina, losing both. At Roland-Garros she reached the second week in 2021 before losing to Iga Świątek.

Junior career

  1. 2016

    Winner of Les Petits As at 13.

  2. 2017

    Australian Open junior champion at 14, on her first appearance at a junior Grand Slam, beating Rebeka Masarova in the final. She ended the year with an ITF title in Dunakeszi.

WTA titles

  1. 2023

    Austin

STATISTICS & RECORDS

Precocious and powerful.

13

Top-10 wins

Victories against members of the world's top 10.

14yrs

Junior Grand Slam champion

She won the 2017 Australian Open junior title on her first appearance at a junior major.

MOURATOGLOU ACADEMY

Her link with the Mouratoglou Academy.

Marta Kostyuk is coached by Sandra Zaniewska, the Polish coach who joined the Mouratoglou team in the early 2020s after ending her own playing career in 2017.

She trains regularly at the Mouratoglou Academy when she is not on tour or during breaks, and prepared for her 2025 season at the academy on the Côte d'Azur.

DISCOVER THE ACADEMY

VIDEO

Watch Marta Kostyuk at the Mouratoglou Academy

Pro players · 0:25

Marta Kostyuk training points!

GAME & EQUIPMENT

How Marta plays.

Her game

Marta Kostyuk likes to take control of the rally. Very expressive on court, she has a powerful, reliable forehand and makes on average 20% fewer unforced errors than her rivals on the WTA Tour. Her serve remains her main weakness: she hits 20% fewer aces and service winners and 40% more double faults than the tour average.

Train in the gear of the Academy: rackets, apparel and accessories.

SHOP MOURATOGLOU

OFF THE COURT

Personal life & interests.

Marta Kostyuk has been married to her long-term partner, Heorhii Sudakov, since the end of 2023. She often posts photos of her dog, who travels with her to tournaments and training sessions, including at the Mouratoglou Academy. Since Russia's invasion of Ukraine in February 2022, she has spoken out publicly and called for Russian athletes to be excluded from sporting competitions, including tennis.

More Mouratoglou players.

ALL PLAYERS
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ON COURT

Train where Marta trains.

The same courts, coaches and methodology, on the French Riviera: camps for juniors and adults, all year round.

DISCOVER THE CAMPS THE FRENCH RIVIERA ACADEMY
Aerial view of the Mouratoglou Academy clay and hard courts on the French Riviera