PARIS: Defending champion Roger Federer moved into the quarterfinals of French Open by beating Stanislas Wawrinka, while second-seeded Venus Williams and No. 4 Andy Murray lost. Federer beat fellow Swiss Wawrinka 6-3, 7-6 (7-5), 6-2 on a windy and cold Court Philippe Chatrier. Czech Tomas Berdych knocked Britain’s Murray out of the fourth round, 6-4, 7-5, 6-3 in a rain delayed match. Venus Williams’ quest for a first French Open title ended in the fourth round against Nadia Petrova of Russia, 6-4, 6-3. Four-time champion Justine Henin won. Robin Soderling beat Croatia’s Marin Cilic 6-4, 6-4, 6-2. Henin beat former world No. 1 Maria Sharapova 6-2, 3-6, 6-3 in a match delayed by darkness last night. Olympic gold medalist and fifth seed Elena Dementieva of Russia beat South Africa’s Chanelle Scheepers 6-1, 6-3. No. 17 Francesca Schiavone of Italy defeated Maria Kirilenko 6-4, 6-4. The Russian had ousted defending champion Svetlana Kuznetsova in the previous round. U.S. Open finalist Caroline Wozniacki of Denmark needed three hours to overcome Italy’s Flavia Pennetta 7-6 (7-5), 6-7 (4-7), 6-2. The world No. 3 moves to her first quarterfinal at Roland Garros, where she’ll meet Schiavone.