Paris: Czech sixth seed Tomas Berdych made the French Open quarterfinals for the second time on Sunday with a 6-4, 6-4, 6-4 win over America`s 10th seed John Isner.
Berdych was a semifinalist in 2010, beating Isner on the way in straight sets in the third round.
Isner was bidding to become the first American man to reach the quarterfinals in Paris since Andre Agassi in 2003 but he was out-served by 28-year-old Berdych who hit 11 aces to his opponent`s seven.
Berdych will face either Roger Federer or Ernests Gulbis for a place in the semifinals.
Spanish 24th seed Fernando Verdasco reached the French Open fourth round for the first time since 2010 with a 6-3, 6-2, 6-3 win over France`s 12th seed Richard Gasquet on Sunday.
The 30-year-old Verdasco goes on to face either seventh seeded Wimbledon champion Andy Murray or Philipp Kohlschreiber of Germany for a place in the quarter-finals.
Murray and Kohlschreiber were locked at 7-7 in the final set of their third round clash when it was suspended on Saturday night.