Iga Swiatek, the reigning World No 3 and a four-time French Open champion, faced an unexpected defeat in the fourth round of the tournament.
Marta Kostyuk of Ukraine secured her place in the next round with a decisive 7-5, 6-1 victory over Swiatek, marking a significant upset.
This loss eliminates Swiatek from contention and leaves the tournament without any former champions still in the running.
Updates
Update at 13:41 UTC on 2026-05-31
France 24 reported Iga Swiatek became the latest former title holder to crash out of the French Open on Sunday after losing in straight sets to Marta Kostyuk of Ukraine, who remains unbeaten on clay this season. Swiatek's exit means there are no former champi. BBC Sport reported Four-time French Open champion Iga Swiatek is knocked out in the fourth round as Marta Kostyuk continues her superb run of form.
Sources: France 24, BBC Sport