Second-seeded Stanislas Wawrinka knocked out local favorite Gastao Elias 6-4, 6-4, and No. 3 Andreas Seppi beat No. 8 Tommy Robredo 6-4, 6-3. Pablo Carreno-Busta rallied past fourth-seeded Fabio Fognini 3-6, 6-4, 6-4 to complete the final four.
In the women's event, third-seeded Anastasia Pavlyuchenkova and No. 4 Carla Suarez Navarro will meet in the final on Saturday.