In the women’s singles, defending champion Serena Williams moved her title defense into the third round after beating Lourdes Dominguez Lino of Spain 6-2, 7-5.
World No. 1 Williams struggled a bit to counter her opponent’s drop-shots and lobs, but stayed on course for a fourth title of the year and the 50th of her career.
“It was a really good clay-court tennis match for me,” Williams said.
World No. 2 Maria Sharapova eased past 21-year-old Christina McHale of the US 6-1, 6-2.
“When you start so late it’s important to make sure you’re ready and awake, and focused from the beginning of the match,” Sharapova said. “I did a good job in that today.”
Also on Tuesday, Marion Bartoli of France overcame a fall to beat qualifier Maria-Teresa Torro-Flor of Spain 6-4, 2-6, 6-4.
In the first round of the women’s doubles, Taiwan’s Hsieh Su-wei and Peng Shuai of China were defeated by Spanish duo Silvia Soler-Espinosa and Carla Suarez Navarro 7-6 (8/6), 4-6, 10-8.
Additional reporting by staff writer