PARIS -- Former French Open champion Svetlana Kuznetsova of Russia advanced to the third round by beating Camila Giorgi of Italy 7-6 (5), 6-3.
Kuznetsova, seeded 27th, broke Giorgi's serve four times and next faces either fifth-seeded Petra Kvitova or Marina Erakovic, who were playing later Thursday.
Sixth-seeded Jelena Jankovic of Serbia, 15th-seeded Sloane Stephens of the United States, and No. 23 Lucie Safarova of the Czech Republic also advanced.
Jankovic won 7-5, 6-0 against Japan's Kurumi Nara, Stephens won 6-1, 6-3 against Slovenia's Polona Hercog, and Safarova beat Australia's Casey Dellacqua 6-1, 5-7, 6-3.
Kiki Bertens of the Netherlands was leading 5-7, 6-4, 3-0 against Anastasia Pavlyuchenkova when the Russian retired with back pains, and in Israel's Julia Glushko won 6-4, 3-6, 6-4 against No. 21 Kirsten Flipkens of Belgium.
Bertens next plays Spaniard Silvia Soler-Espinosa, who downed Belgium's Yanina Wickmayer 6-2, 6-4.
Former French Open champion Ana Ivanovic of Serbia reached the third round by beating Elina Svitolina of Ukraine 7-5, 6-2 on Thursday.
The 11th-seeded Ivanovic dropped her own serve three times but broke Svitolina's serve six times. She clinched victory on her second match point with a forehand winner down the line on Svitolina's serve.
Since winning here in 2008 for her only Grand Slam title, the 26-year-old Ivanovic has reached only one quarterfinal at a major - the U.S. Open in 2012 - and has never been past the fourth round at Roland Garros.
She next faces No. 23 Lucie Safarova of the Czech Republic, who won 6-1, 5-7, 6-3 against Casey Dellacqua of Australia.
Copyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.