Australian Open champion Stan Wawrinka lost in the first round at the French Open on Monday, surprised by Guillermo Garcia-Lopez of Spain 6-4, 5-7, 6-2, 6-0.
The third-seeded Wawrinka was playing his first Grand Slam match as a major champion, but he faded against his 41st-ranked opponent.
Wawrinka was a quarterfinalist at Roland Garros last year, and he won a clay-court title at Monte Carlo last month, beating pal Roger Federer in the final. Wawrinka and Federer won a doubles gold medal together for Switzerland at the 2008 Beijing Olympics.
Garcia-Lopez has never been past the third round at a Grand Slam tournament.