Andy Murray's hopes of a first French Open title remain intact after he pulled off another great escape against Radek Stepanek.
The world number two recovered to win a match from two sets down for the eighth time in his career, beating 37-year-old qualifier Stepanek 3-6 3-6 6-0 6-3 7-5.
Murray, whose last first-round exit at a grand slam was more than eight years ago, lost the first two sets when the match began on Monday but had turned things around and led 4-2 in the fourth when darkness brought an end to play.
He had no trouble polishing off that set but the fifth was hugely tense and at one point Stepanek was two points away from victory.
But Murray held firm and then took advantage of the first drop in his opponent's level to clinch victory after three hours and 41 minutes to set up a match against France's Mathias Bourgue.
For details of all of Wednesday's show court matches, scroll down.
Philippe-Chatrier Court (10am)
(6) Simona Halep (Rom) v Zarina Diyas (Kaz)
Myrtille Georges (Fra) v (4) Garbine Muguruza (Spa)
Mathias Bourgue (Fra) v (2) Andy Murray (Gbr)
(8) Milos Raonic (Can) v Adrian Mannarino (Fra)
Suzanne-Lenglen Court (10am)
Su-Wei Hsieh (Tpe) v (10) Petra Kvitova (Cze)
Taro Daniel (Jpn) v (3) Stanislas Wawrinka (Swi)
Bjorn Fratangelo (USA) v (9) Richard Gasquet (Fra)
Caroline Garcia (Fra) v (2) Agnieszka Radwanska (Pol)
Court 1 (10am)
(5) Kei Nishikori (Jpn) v Andrey Kuznetsov (Rus)
Viktorija Golubic (Swi) v (11) Lucie Safarova (Cze)
(16) Gilles Simon (Fra) v Guido Pella (Arg)
Veronica Cepede Royg (Par) v (19) Sloane Stephens (USA)
