Seventh seed Serena Williams moved into the French Open third round after overcoming Romania's Mihaela Buzarnescu in a challenging three-set win.
Williams, 39, won 6-3 5-7 6-1 to set up a meeting in the last 32 with fellow American Danielle Collins.
Russia's Daria Kasatkina delivered a surprise when she knocked out Swiss 10th seed Belinda Bencic.
Belarusian 15th seed Victoria Azarenka and 2019 runner-up Marketa Vondrousova also progressed in straight sets.
Smiling Serena pleased with tough win
Williams is again going for a 24th major title to equal Australian Margaret Court's all-time record, although her latest attempt for history comes at a place where she has not progressed past the fourth round since 2016.