Top-seeded Juan del Potro continued his impressive form at the clay-court Estoril Open with a 6-2, 6-2 victory over seventh-seeded Albert Montanes to reach the semifinals.
Del Potro, who hadn't played a competitive match for five weeks before traveling to Portugal, is 25-6 this year as he prepares for the French Open.
The 12th-ranked Argentine, who won the US Open in 2009, collected his first title of the season in February when he won the Open 13 in Marseille, France.
Del Potro will play third-seeded Stanislas Wawrinka on Saturday for a place in Sunday's final. The Swiss player, making his debut at Estoril, beat sixth-seeded Robin Haase of the Netherlands 6-1, 6-4.
Second-seeded Richard Gasquet reached his first semifinal of the season with a 7-6 (1), 6-2 win over Spanish qualifier Daniel Munoz de la Nava.
The 18th-ranked Gasquet reached the 2007 final here before losing to current No. 1 Novak Djokovic on the Estoril clay.
The Frenchman will take on fourth-seeded Albert Ramos after the Spaniard overcame Portugal's Joao Sousa 6-2, 6-3.
Kaia Kanepi has a chance to win her second WTA title after beating top-seeded Roberta Vinci 6-2, 7-5 to reach Saturday's women's final.
The sixth-seeded Estonian, who won the Brisbane International in January, rallied after trailing 2-5 in the second set against the Italian, who won three titles last year.
Kanepi will play Carla Suarez Navarro in the final, after the Spaniard beat Karin Knapp of Italy 6-4, 6-0.
