Marta Kostyuk defeated Iga Świątek in the fourth round of the 2026 French Open on Sunday [1].

The result marks a significant shift in the tournament landscape, as Świątek entered the event as a four-time champion [2]. Her exit removes one of the most dominant forces in women's clay-court tennis from the bracket.

Kostyuk, the No. 15 seed, secured the victory in straight sets with a final score of 7-5, 6-1 [3]. The match took place at Roland Garros in Paris, where Kostyuk maintained a high-level game to outpace the favorite [1, 2].

Świątek, the No. 3 seed, struggled throughout the match with her serve and shot selection [3, 4]. These inconsistencies allowed Kostyuk to seize control of the match early and maintain a surging momentum through the second set [4].

This defeat represents Świątek's earliest exit from the French Open since 2019 [1]. The loss continues a trend of high seeds falling early in the 2026 tournament [3].

Kostyuk's victory is a result of aggressive play that disrupted the rhythm of the former champion. While Świątek has historically dominated the red clay of Paris, her inability to find a consistent serve on Sunday left her vulnerable to Kostyuk's precision [1, 4].

Marta Kostyuk defeated Iga Świątek in the fourth round of the 2026 French Open

The exit of Iga Świątek opens the draw for other contenders and signals a potential vulnerability in the top seeds at the 2026 French Open. Because Świątek has been the benchmark for clay-court excellence for several years, her fourth-round departure suggests a volatile competitive environment where lower-seeded players like Kostyuk can now realistically vie for the title.