Number one seed Mariano Puerta eased into the quarter-finals of the Dutch Open in Amersfoort with a 6-2 6-2 victory over Juan Antonio Marin.
Argentine Puerta is playing his first clay-court tournament since losing in the final of the French Open.
Puerta now meets Ivo Minar, who defeated Santiago Ventura 7-6 6-4.
Second seed Fernando Gonzalez beat Robin Vik 6-2 6-2 and will next play Daniele Bracciali, who beat local favourite Raemon Sluiter 1-6 7-6 6-2.