Four top - seeds competed at the Western and Southern Open on clay . Maria Sharapova , Li Na , Petra Kvitova and Marion Fischer are all into the third round . American Serena Williams won her first round match , beating Lucie Hradecka .
Four top 10 seeds advanced at the Western and Southern Open on Tuesday . Maria Sharapova , Li Na , Petra Kvitova and Marion Bartoli are all into the third round . American Serena Williams won her first round match , beating Lucie Hradecka .