French Open: Iga Świątek upset in straight sets by Maria Kostyuk, latest high seed to lose at 2026 tournament Swiatek, a four-time French Open champion, suffered her earliest defeat at Roland Garros since 2019. Content Original Link: https://sports.yahoo.com/tennis/article/french-open-iga-swiatek-upset-in-straight-sets-by-maria-kostyuk-latest-high-seed-to-lose-at-2026-tournament-135108039.html