Former U.S. Open champion Sloane Stephens beat French teenager Diane Parry 6-2, 6-3 to reach the fourth round at Roland Garros.
The American was the runner-up in 2018 after having won the title at Flushing Meadows the year before.
Stephens will play No. 23 Jil Teichmann, who advanced by defeating two-time Grand Slam champion Victoria Azarenka 4-6, 7-5, 7-6 (5).
Teichmann amassed 53 winners and 58 unforced errors against the 15th-seeded Azarenka.