Qualifier Alla Kudryavtseva rallied to upset ninth-seeded Alize Cornet 1-6, 6-2, 6-4 in the first round of the WTA tournament in Strasbourg on Sunday.
Fourth-seeded Kristina Mladenovic needed three sets to outlast Madison Brengle of the United States 6-4, 2-6, 7-5.
Also, Hsieh Su-Wei defeated Xu Yi-fan 6-3, 6-1 to advance to the second round.
Jil Belen Teichmann rallied to defeat Kurumi Nara 2-6, 7-5, 6-1, and Alison Riske also advanced by beating Alize Lim 6-0, 7-5.
The outdoor clay-court event is a warm-up for the French Open, the second Grand Slam tournament of the year, which starts in a week.