PARIS (AFP) - Former finalist Samantha Stosur and three-time semi-finalist Jelena Jankovic beat torrential Paris rain to reach the French Open third round on Thursday.

After a 1hr 40min delay had left ninth-seeded Stosur a set and 4-1 up on France's Kristina Mladenovic, the Australian then took advantage of a 20-minute window on their return to Court Philippe Chatrier to complete a 6-4, 6-3 win.

The 2011 US Open champion will face Serb 18th seed Jelena Jankovic for a place in the last 16.

Jankovic, a semi-finalist in 2007, 2008 and 2010, beat Spain's Garbine Muguruza 6-3, 6-0.

"I think she's a great up and coming player. She hits the ball very hard, very flat," said Jankovic of the Spaniard. "And especially in the beginning of the match she gave me a lot of trouble. It was not easy playing against such a player."

China's Zheng Jie also reached the last 32 with a 6-3, 6-1 win over Melanie Oudin of the United States.

Kazakh 27th seed Yaroslava Shvedova, who made the quarter-finals last year, was knocked out by Argentine qualifier Paula Ormaechea, 6-4, 7-6 (8-6).

Ormaechea will face either Chinese sixth seed Li Na, the 2011 champion, or America's Bethanie Mattek-Sands for a spot in the last 16.