David Ferrer upset third-seeded fellow Spaniard Juan Carlos Ferrero 3-6, 7-5, 6-3, to advance to the quarterfinals of the Grand Prix tennis tournament in Lyon, France. Ferrer will face Jonas Bjorkman of Sweden in the round-of-eight Friday.

Also Thursday, Mikhail Youzhny of Russia overcame Agustin Calleri of Argentina (6-3, 6-7, 7-6) in three sets to claim a quarterfinal berth against Xavier Malisse of Belgium. Fourth-seeded Joachim Johansson of Sweden beat French qualifier Julien Benneteau, 6-3, 6-4, and will play his countryman Robin Soderling.

Jurgen Melzer of Austria ousted Hicham Arazi of Morocco (4-6, 7-6, 6-1) to advance to his seventh quarterfinal of the year. He will face seventh-seeded Vince Spadea of the United States.

Amelie Mauresmo won her first match as the top-ranked women's tennis player in the world at the Porsche Grand Prix in Filderstadt, Germany. The top-seeded Frenchwoman advanced to the quarterfinals Thursday, with a 7-5, 6-4 win over Patty Schnyder of Switzerland. She'll face American Lisa Raymond, who needed three sets to dispose of Italian player Silvia Farina Elia (6-7, 6-6, 6-0).

Third-seeded Anastasia Myskina and number-four Svetlana Kuznetsova of Russia also moved into the round-of-eight. Despite a shoulder injury, Myskina edged Frenchwoman Nathalie Dechy in three sets (4-6, 6-2, 6-1), while Kuznetsova downed another Russian, Elena Bovina, 7-5, 6-4. Kuznetsova will take on Fabiola Zuluaga of Colombia, who beat Anna Smashnova-Pistolesi when the Israeli retired with a left groin strain while trailing 6-4, 1-0.

On Friday, Mauresmo meets Lisa Raymond of the United States in another quarterfinal, while second-seeded Davenport faces qualifier Jelena Jankovic, after the Serbia-Montenegro player eliminated Slovakia's Daniela Hantuchova (6-1, 6-4).