French Open 2026 results: Iga Swiatek, four-time champion, loses to Marta Kostyuk in fourth round

Four-time French Open champion Iga Swiatek was eliminated in the fourth round of the 2026 French Open on her 25th birthday, losing in straight sets to Ukrainian 15th seed Marta Kostyuk. Kostyuk, continuing impressive form, defeated the Polish third seed 7-5, 6-1 on Court Philippe Chatrier. Swiatek, a six-time Grand Slam winner nicknamed the 'Queen of Clay,' has not won a title on the clay surface since her most recent Roland Garros triumph.