Almagro cruises, Verdasco out
The Spaniard wasted little time in booking his place in the last four, dominating Berlocq and breaking the Argentine’s serve three times.
“I played great today,” Almagro said. “Now it’s about resting and start thinking about the semi-finals.”
The world number 11 will play fellow Spaniard Albert Ramos in the semi-finals, after the eighth seed stunned third seeded Fernando Verdasco, also Spanish, 7-6(5) 6-3.
Both players struggled with their serve, facing 10 break points apiece during the course of the match.
But, while Volandri was able to take advantage of his opportunities on three separate occasions, Nalbandian was only able to break twice.
The Italian will face home favourite Thomaz Bellucci for a place in the final, after the Brazilian fourth seed overcame dropping the first set to beat Argentina's Leonardo Mayer 3-6 6-2 7-5.