Marta Kostyuk

Insights

Two semifinal runs define the peak

Kostyuk’s best Grand Slam results are two semifinals, and both appear in 2026: the French Open at age 23 and Wimbledon at age 24. No other result in the table matches that level, making 2026 her clear peak season.

Her breakthrough came early at 15

Her first listed Grand Slam result is a fourth-round run at the 2018 Australian Open, reached at age 15. That remains one of only two R16-or-better results before 2026, alongside the 2021 French Open R16 at age 18.

Clay produced her deepest non-2026 run

Before the 2026 semifinals, her best French Open result was the 2021 round of 16, and she also reached the 2024 quarterfinals at the Australian Open. Across the table, clay is the only surface where she has twice gone beyond the third round.

2024 was her most balanced all-around Slam season

In 2024 she reached the Australian Open quarterfinals, then the Wimbledon and US Open round of 32, and the French Open round of 64. That is her only season with four Slam appearances all ending between the quarterfinals and round of 64.

Her Slam record is solid but still front-loaded with early exits

Across 26 tournaments and 66 matches, she owns a 40-26 record, a 61% win rate. Even so, the table still shows many exits in the first two rounds, including seven R128 results and six R64 results.