The 1998 French Open champion, Moya won his seventh straight match, including a title in Bastad last week. Moya has lost just one set during that span.
Moya has risen to 12th in the ATP points race and will face fifth seed Fernando Vicente in the quarterfinals. Vicente advanced by defeating fellow Frenchman Paul-Henri Mathieu, 7-6 (7-5), 6-2.
Fourth seed Ivan Ljubicic of Croatia moved into the quarterfinals by defeating wild card countryman Mario Radic, 7-5, 6-1. The 23-year-old Ljubicic, who is seeking his first ATP win, will meet another Croatian, Zeljko Krajan, who topped Peru's Luis Horna, 6-4, 4-6, 6-3.
David Ferrer of Spain and Victor Hanescu of Romania recorded just their second ATP match wins to advance to Friday's quarterfinals. Ferrer defeated countryman Marc Lopez, 6-3, 6-1, and will play Argentina's Guillermo Croatia, who topped Chile's Nicolas Massu, 7-6 (7-4), 6-2.