Sara Errani of Italy and Angelique Kerber of Germany both reached the French Open quarter-finals for the first time on Sunday with straight sets wins in fourth round action. Errani, seeded 21, defeated Svetlana Kuznetsova of Russia 6-0, 7-5, while 10th seed Kerber ousted Petra Martic of Croatia 6-3, 7-5. The pair will meet in the last eight in a top half of the draw which also contains top seed Victoria Azarenka of Belarus, who takes on Dominika Cibulkova of Slovakia later Sunday. Errani has been the form player on clay this year winning tournaments in Acapulco, Barcelona and Budapest. She also reached the Australian Open quarter-finals in January on hardcourts.