British number one Tim Henman has been beaten in the French Open second round by little-known Peruvian Luis Horna.
Henman, who reached the Roland Garros semi-finals last year, was defeated 5-7 7-6 (7-2) 3-6 4-6.
The seventh seed was off colour for much of the match and was warned by the umpire in the third set for swearing.
Although Horna - who is ranked 59 - beat Roger Federer in the 2002 French Open, he had never been beyond the second round at Roland Garros before.
"It's disappointing but I feel he played better than me and deserved it," Henman said.
"It was really tight to begin with but he played really good tennis.
"At a couple of key times, he hit some great returns and great passing shots. I certainly give him a lot of credit for the way he played.
"When you are playing the kind of high-risk tennis I need to play, it's hard to do it for three hours and eliminate mistakes from your game."
Henman also revealed he had been troubled by a back problem.
"There was some stiffness in my back, but I don't think it had any bearing on the match."
The defeat ended British interest in the tournament, following Greg Rusedski's first-round loss to Brazilian qualifier Flavio Saretta on Tuesday.
Horna will now face Romania's Victor Hanescu in the third round, while Henman will focus his attention on the grasscourt season and Wimbledon.
The 30-year-old Briton had started the match superbly, racing into a 3-0 lead, but Horna broke back and went on to take the first set.
Henman clinched the following set on a tiebreak, but the Peruvian took control to from then on to claim the match.
Henman became the first Briton to reach the semis of the French Open for 41 years when he progressed to the last four at Roland Garros last year.