Paris - Swiss ninth seed Stanislas Wawrinka reached his first French Open quarter-final on Monday, beating French seventh seed Richard Gasquet, 6-7 (5/7), 4-6, 6-4, 7-5, 8-6.
Wawrinka goes on to face defending champion Rafael Nadal for a place in the semi-finals after coming through a four hour 16min struggle.
It was his sixth career comeback from two sets to love down.
With Roger Federer already into the last-eight, it will be the first time that Switzerland has two men in the Roland Garros quarter-finals.
Gasquet was defeated for the 15th time in 16 matches at the fourth round stage of a Grand Slam.
Both players needed medical treatment -- Wawrinka on his right hamstring and Gasquet on his left thigh.
Wawrinka fired 92 winners in the match.
French Open fourth round results (x denotes seeded player):
Novak Djokovic (SRB x1) bt Philipp Kohlschreiber (GER x16) 4-6, 6-3, 6-4, 6-4
Tommy Haas (GER x12) bt Mikhail Youzhny (RUS x29) 6-1, 6-1, 6-3
Rafael Nadal (ESP x3) bt Kei Nishikori (JPN x13) 6-4, 6-1, 6-3
Stanislas Wawrinka (SUI x9) bt Richard Gasquet (FRA x7) 6-7 (5/7), 4-6, 6-4, 7-5, 8-6
Maria Kirilenko (RUS x12) bt Bethanie Mattek-Sands (USA) 7-5, 6-4
Victoria Azarenka (BLR x3) bt Francesca Schiavone (ITA) 6-3, 6-0
Maria Sharapova (RUS x2) bt Sloane Stephens (USA x17) 6-4, 6-3
Jelena Jankovic (SRB x18) bt Jamie Hampton (USA) 6-0, 6-2