Marta Kostyuk stuns four-time champion Iga Swiatek at 2026 Roland Garros

The 15th-seeded Ukrainian extended her magnificent clay-court winning streak to 16 matches with a dominant 7-5, 6-1 victory over the World No. 1 in Paris.

Photo: EPA Images

The clay courts of Roland Garros 2026 bore witness to one of the most significant upsets in recent WTA history. In a stunning Sunday round-of-16 clash, 15th seed Marta Kostyuk of Ukraine secured the biggest victory of her professional career by eliminating four-time French Open champion Iga Swiatek in straight sets, 7-5, 6-1. The result guarantees an unprecedented first-time champion in Paris following the earlier departure of defending champion Coco Gauff.

Kostyuk entered the court carrying an uphill battle against the tournament favorite, having lost all three prior encounters without taking a single set from the former World No. 1. However, the 23-year-old Ukrainian relied on the flawless baseline form that has kept her undefeated on clay throughout the 2026 season. After an intense baseline battle in the opening stages, Swiatek—who turned 25 on Sunday—showed unexpected vulnerability on her serve, registering costly double faults and unforced errors. Kostyuk capitalized on the opportunities, breaking Swiatek in the twelfth game to close the opening set 7-5 with a brilliant backhand passing shot.

Following a brief baseline stoppage as Swiatek left the court, the top seed attempted to mount a comeback by breaking Kostyuk's service game early in the second frame. Yet, Kostyuk’s relentless court coverage and devastating groundstrokes immediately defused the threat. The world No. 15 won five consecutive games, dismantling Swiatek’s standard tactical setups to close out the match with a definitive 6-1 scoreline. With this victory, Kostyuk extended her current clay-court streak to 16 wins, following title runs earlier this season in Rouen and the Mutua Madrid Open.

Kostyuk’s milestone victory coincided with a heroic performance from fellow countrywoman Elina Svitolina. The 7th seed rallied from a set down to defeat Switzerland's Belinda Bencic 4-6, 6-4, 6-0. The upcoming quarterfinal matchup between Kostyuk and Svitolina guarantees that, for the first time in the Open Era (since 1968), a Ukrainian woman will compete in the Roland Garros semifinals, offering an inspiring milestone for their nation.