Gstaad, 29 July 2011 | AP

Second-seeded Stanislas Wawrinka advanced to the quarterfinals of his home Swiss Open tournament on Thursday, beating Australia’s Peter Luczak 6-3 7-5.

Wawrinka used his first serves, including nine aces, to control play against the 248th-ranked Luczak.

The Swiss No.2 plays Marcel Granollers in the quarters, after the eighth-seeded Spaniard completed a rain-affected match that started on Wednesday.

Granollers quickly won two games to beat Igor Andreev of Russia 6-1 6-3.

Two more of Spain’s seeded players had straight sets wins in rain-interrupted matches.

Fourth-seeded Fernando Verdasco beat Frederico Gil of Portugal 6-3 6-2 and fifth-seeded Feliciano Lopez defeated compatriot Daniel Gimeno-Traver 6-3 6-4.

Verdasco, ranked No.20, is seeking his first title of the season and broke Gil’s serve twice in each set without dropping his own.

Top-seeded Nicolas Almagro, another Spaniard, will resume his second-round match on Friday, after rain curtailed play when Jarkko Nieminen of Finland led 3-2 in the opening set.

In another rain-delayed match on Thursday, unseeded Andreas Haider-Maurer of Austria revered a one-set overnight deficit to beat Colombian Santiago Giraldo 3-6 6-2 6-4.

Julien Benneteau of France beat Germany’s Matthias Bachinger 6-4 6-4 to earn a quarterfinal match-up against Verdasco.