PALERMO, Sicily (AP) _ Top-seeded Mariano Puerta quit during his second-round match Thursday because of an injured wrist and withdrew from the $375,000 ATP tournament.

The Argentine left-hander was trying to this clay-court event for the second time in three years.

Puerta, his left wrist ailing from tendinitis, withdrew at the start of the second set. He lost the first set 6-2 to David Sanchez of Spain. Sanchez was one of four Spaniards to advance to the quarterfinals.

Sergi Bruguera, recovering from shoulder and knee injuries that have slowed him for nearly two years, downed No. 7 Albert Portas 7-6 3), 7-5 in an all-Spanish match; Alberto Martin beat Germany's Markus Hantschk 6-3, 6-1; and Juan Balcells defeated Hernan Gumy of Argentina 6-4, 6-4.

Also, Cristophe Rochus of Belgium downed Galo Blanco of Spain 6-3, 6-4.