Berdych downs Isner for quarter-final spot at Roland Garros
Czech Republic's Tomas Berdych celebrates after beating US rival John Isner (unseen) at the Roland Garros stadium in Paris, on June 1, 2014 - by Patrick Kovarik
Berdych was a semi-finalist 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 quarter-finals 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 semi-finals.