Marta Kostyuk spent years as one of tennis’s most talked-about prospects, and in 2026 she turned that promise into a breakthrough. The Ukrainian won the biggest title of her career at the Madrid Open, a WTA 1000, during a 16-match winning run, then reached her first two Grand Slam semifinals back to back at Roland Garros and Wimbledon. On September 14 she made her top-10 debut, becoming only the second Ukrainian woman to get there after Elina Svitolina, according to the WTA.
A powerful, strong-willed competitor who first made headlines as a 15-year-old qualifier, Kostyuk has also been one of the sport’s most outspoken figures on the war in Ukraine. At Wimbledon she spoke of attacks that hit residential streets about five kilometres from her parents’ home while she was playing. The profile is a contender entering the prime of her career.
Quick facts
- Full name: Marta Kostyuk
- Nationality: Ukraine (born Kyiv)
- Born: June 28, 2002
- Turned pro: 2016
- Plays: Right-handed, two-handed backhand
- Coach: Sandra Zaniewska
- Career titles: 3 WTA singles titles (Austin 2023, Rouen and Madrid 2026)
- Career high: World No. 10 (September 14, 2026)
- Identity: Powerful, aggressive baseliner with a strong competitive temperament
Game overview
Kostyuk plays an aggressive, front-foot game built on clean, powerful hitting and a fierce competitive edge. In 2026 the consistency caught up with the firepower. Her Wimbledon quarterfinal against Jasmine Paolini, a 6-3, 6-2 win in 69 minutes on her Centre Court debut, was the clearest example: the WTA reported she did not face a break point and was taken to deuce only once in eight service games.
Playing style and strengths
Power off both wings. Clean, aggressive hitting that dictates rallies from the baseline.
Serving under pressure. Her serve held up on the biggest court she had played, as the Paolini match showed.
Competitive fire. A strong-willed temperament that lifts her in big matches.
Pressure points and vulnerabilities
- Closing the last step: 0-2 in major semifinals, both in 2026
- Finals: runner-up in Brisbane in January, and three finals lost against three won in her career, according to the WTA
- Managing emotion and intensity in the tightest moments
- Holding a top-10 place against a deep field
Career milestones
- 2017: Australian Open girls’ singles champion
- 2018: Reached the Australian Open third round as a 15-year-old qualifier
- 2023: First WTA title in Austin
- 2024: First Grand Slam quarterfinal at the Australian Open and first WTA 1000 semifinal at Indian Wells; top-20 debut
- 2026: Rouen and Madrid titles during a 16-match winning streak; Roland Garros and Wimbledon semifinals; top-10 debut
Grand Slam record in context
Kostyuk’s major record changed shape in 2026. Before this year her best was the 2024 Australian Open quarterfinal. In Paris she beat compatriot Elina Svitolina in the quarterfinals before losing to Mirra Andreeva, the eventual champion. At Wimbledon she reached a second straight major semifinal, beating Jasmine Paolini before Linda Nosková, the eventual champion, beat her 6-4, 6-4 in the semifinals.
She reached the US Open fourth round for the second straight year, and that result carried her into the top 10.
Grand Slam best results
- Australian Open: Quarterfinal (2024)
- Roland Garros: Semifinal (2026)
- Wimbledon: Semifinal (2026)
- US Open: Fourth round (2025, 2026)
What to watch next
- The WTA Finals: whether her season carries her to Indian Wells in November.
- Billie Jean King Cup: Ukraine meets Italy in the semifinals.
- A first major final: turning two semifinals into a championship match.
Related reading
- Elina Svitolina Profile
- Linda Nosková Profile
- ATP Finals and WTA Finals Guide
- WTA 1000 Guide
- Grand Slams Explained
Season Snapshot — September 25, 2026
- Ranking: World No. 10 after her top-10 debut on September 14; she started 2026 at No. 26, according to the WTA
- 2026 titles: Madrid (WTA 1000), Rouen
- 2026 final: Brisbane (runner-up)
- 2026 Grand Slams: Roland Garros semifinal (l. Andreeva); Wimbledon semifinal (d. Paolini 6-3, 6-2; l. Nosková 6-4, 6-4); US Open fourth round
- Team: Ukraine vs. Italy, Billie Jean King Cup semifinals
- Coach: Sandra Zaniewska
This snapshot is dated and will change. The career record above does not.
