On the women's side, Nadia Petrova, Maria Sharapova and Vera Zvonareva all won their second round matches. Ana Ivanovic, victor of Caroline Wozniacki, Agnieszka Radwańska, who beat Alizé Cornet, and Patty Schnyder all advanced to the fourth round. They were joined by twenty-seventh seed Katarina Srebotnik, who produced the first big upset of the day by eliminating 2002 French Open champion, fifth seed and favorite Serena Williams 6–4, 6–4, and twenty-sixth seed Flavia Pennetta, who defeated 2002 French Open runner-up, eighth seed and other favorite Venus Williams 7–5, 6–3, marking the first time since Roland-Garros 2004 both Williams sisters lost on the same day. Serena Williams was the only remaining former champion left in the women's draw.