Paris - Defending champion Stan Wawrinka reached the last 16 at the French Open on Friday with a 6-4, 6-3, 7-5 win over France's Jeremy Chardy.
The third seed from Switzerland next goes up against Victor Troicki of Serbia for a place in the quarter-finals.
It was Wawrinka's 10th straight win at Roland Garros following his run to a second Grand Slam title last year.
He is seeking to become the eighth man in the Open era, since 1968, to successfully defend the title in Paris.
"Very good match and at a top level," he said of his win.
"I am happy with the way I played and with my movement. I tried to get on top physically from the start and not be on the back foot."
French Open results on Friday (x denotes seeded player):
Milos Raonic (CAN x8) bt Andrej Martin (SVK) 7-6 (7/4), 6-2, 6-3
Andy Murray (GBR x2) bt Ivo Karlovic (CRO x27) 6-1, 6-4, 7-6 (7/3)
Albert Ramos-Vinolas (ESP) bt Jack Sock (USA x23) 6-7 (2/7), 6-4, 6-4, 4-6, 6-4
Kei Nishikori (JPN x5) bt Fernando Verdasco (ESP) 6-3, 6-4, 3-6, 2-6, 6-4
Richard Gasquet (FRA x9) bt Nick Kyrgios (AUS x17) 6-2, 7-6 (9/7), 6-2
John Isner (USA x15) bt Teimuraz Gabashvili (RUS) 7-6 (9/7), 4-6, 2-6, 6-4, 6-2
Stan Wawrinka (SUI x3) bt Jrmy Chardy (FRA x30) 6-4, 6-3, 7-5
Victor Troicki (SRB x22) bt Gilles Simon (FRA x16) 6-4, 6-2, 6-2
Garbie Muguruza (ESP x4) bt Yanina Wickmayer (BEL) 6-3, 6-0
Simona Halep (ROM x6) bt Naomi Osaka (JPN) 4-6, 6-2, 6-3
Irina-Camilia Begu (ROM) bt Annika Beck (GER) 6-4, 2-6, 6-1
Shelby Rogers (USA) bt Petra Kvitova (CZE x10) 6-0, 6-7 (3/7), 6-0
Samantha Stosur (AUS x21) bt Lucie Safarova (CZE x11) 6-3, 6-7 (0/7), 7-5
Svetlana Kuznetsova (RUS x13) bt Anastasia Pavlyuchenkova (RUS x24) 6-1, 6-4
Agnieszka Radwanska (POL x2) bt Barbora Zhlavov Strcov (CZE x30) 6-2, 6-7 (6/8), 6-2
Tsvetana Pironkova (BUL) bt Sloane Stephens (USA x19) 6-2, 6-1