World number two Andy Murray had to fight back to beat wildcard Mathias Bourgue in five sets and secure his place in the French Open third round.
The British number one lost eight consecutive games to drop the second and then the third sets to the inspired 22-year-old Grand Slam debutant.
But Murray, 29, used all his experience to seal a 6-2 2-6 4-6 6-2 6-3 win over the world number 164 from France.
Fellow Briton Kyle Edmund lost 6-4 6-4 6-4 to American 15th seed John Isner.
Aljaz Bedene, who plays on Thursday, is the only other British player left in the singles tournaments in Paris.