Tokyo, Japan -- (Sports Network) - Top seeds David Ferrer and Andy Roddick were among Thursday's third-round winners at the $869,000 Japan Open Tennis Championships.

The reigning Tokyo champion Ferrer rallied to top Japanese wild card Takao Suzuki in three sets, 4-6, 6-3, 6-2, while Roddick had little trouble dispensing of No. 14 seed Jurgen Melzer of Austria, 7-6 (7-2), 6-2.

Ferrer will face fifth-seeded Argentine Juan Martin del Potro, who routed 11th-seeded Finn Jarkko Nieminen 6-1, 6-3, in the quarterfinals, while last week's Beijing titlist Roddick secured a date with Serbian Viktor Troicki on Friday.

Troicki dropped the first set, 5-7, to seventh-seeded Frenchman Jo-Wilfried Tsonga in their third-round match, but Tsonga was forced to retire in the second set with an abdominal strain, with Troicki leading 2-1. The Australian Open runner-up Tsonga captured his first-ever ATP title in Bangkok last week.

In other third-round action, ninth-seeded Czech Tomas Berdych reached the quarters by ousting No. 6 seed Tommy Robredo of Spain, 7-6 (8-6), 6-2, while third-seeded Fernando Gonzalez of Chile outlasted American Amer Delic, 6-4, 7-6 (7-4).

Also, fourth seed Richard Gasquet of France destroyed local favorite Kei Nishikori, 6-1, 6-2, and 12th-seeded German Rainer Schuettler bested eighth- seeded Mikhail Youzhny of Russia, 6-3, 6-7 (12-14), 6-4. Gasquet was last year's runner-up here to Ferrer. Schuettler titled here back in 2003.

Friday's other quarters will pit Gonzalez against Berdych and Gasquet versus the Wimbledon semifinalist Schuettler.

The 2008 Tokyo champion will collect $135,000.