Defending champion Serena Williams sealed a place in the French Open last 16, beating home favourite Kristina Mladenovic after a lengthy rain delay.
Top seed Williams won the first set 6-4 and was a tie-break away from defeating the 30th seed when they were forced off Court Philippe Chatrier.
After a two-and-a-half hour delay, Williams converted a fifth match point to win 6-4 7-6 (12-10) in Paris.
The American, 34, is aiming for her 22nd Grand Slam title.
Meanwhile, Venus Williams was leading France's Alize Cornet 2-1 when play stopped on Court Suzanne Lenglen.
British number two Aljaz Bedene and top seed Novak Djokovic were set to play later on Chatrier, but their match has been switched to Lenglen - after Venus Williams and Cornet - because of the rain delay.