Top seeded Juan Monaco of Argentina breezed past Igor Andreev of Russia 6-2, 6-1, setting up a quarterfinal match against fifth-seeded Spaniard Albert Montanes, who beat qualifier Rogerio Dutra Silva of Brazil 7-5, 6-2.
No. 2 Juan Ignacio Chela will play his second-round match Thursday against fellow Argentine Horacio Zeballos. No. 3 Thomaz Bellucci of Brazil will face Federico Delbonis of Argentina in the day's other top match.