Top-seeded David Ferrer was among Wednesday's second-round winners at the $640,000 Nice Open, a final clay-court French Open tune-up.

The 29-year-old Spaniard cruised past Italian Andreas Seppi 6-3, 6-2 on the red clay at the Nice Lawn Tennis Club. Ferrer will meet Alexandr Dolgopolov in the quarterfinals after the fifth-seeded Ukrainian required a pair of tiebreaks to take down Spain's Pere Riba 7-6 (7-5), 7-6 (7-5).

Second-seeded Czech Tomas Berdych also joined Ferrer in the last eight by posting a 6-1, 6-4 triumph over Frenchman Adrian Mannarino. Berdych's next opponent will be Latvian Ernests Gulbis, who outlasted Denis Istomin of Uzbekistan 6-3, 4-6, 6-3.

Additional Day-4 wins came for Spaniard Nicolas Almagro and Dutchman Robin Haase.

A third-seeded Almagro overcame a dropped set to beat Argentine Carlos Berlocq 6-7 (5-7), 6-4, 6-3. Up next for Almagro will be countryman Pablo Andujar, who took out French favorite and wild card Julien Benneteau 6-3, 6-4.

Haase, meanwhile, stunned seventh-seeded Ukrainian Sergiy Stakhovsky in straight sets, 6-2, 6-4, to set up a quarterfinal encounter on Thursday with Victor Hanescu. The Romanian notched a 7-5, 6-2 victory over American lucky loser Michael Russell, who replaced former world No. 1 Andy Roddick after he pulled out of the draw on Tuesday with a right shoulder injury.

This week's winner will collect $102,000.