GSTAAD, Switzerland -- Seventh-seeded Gaston Gaudio of Argentina ousted Marc Rosset of Switzerland in straight sets Friday in the quarterfinals of the Swiss Open.

Also advancing to Saturday's semifinals were No. 8 Alex Corretja, and qualifiers Ivan Ljubicic and Radek Stepanek.

Gaudio beat Rosset 6-3, 7-6 (3), and Corretja, two-time winner of the tournament, eliminated fellow Spaniard David Sanchez 6-3, 6-3. Ljubicic downed Spaniard Galo Blanco 6-3, 6-7 (10), 6-4, and Stepanek, from the Czech Republic, ousted Hungarian Attila Savolt 7-5, 6-2.

Gaudio will face Ljubicic and Corretja will oppose Stepanek.