Ernests Gulbis was eliminated from the Monte Carlo Masters on Monday in the first round, losing to Andreas Haider-Maurer 6-1, 6-0.
The 13th-seeded Latvian, a semifinalist at last year's French Open, hit a flurry of unforced errors against the 52nd-ranked Haider-Maurer.
Gulbis has lost in the opening round in seven of the eight tournaments he has played this season.
Struggling with his big forehand, he enjoyed a short bright spell in the second game of the second set but failed to convert three straight break points.
It was Haider-Maurer's first win in Monte Carlo, with the 28-year-old Austrian now set to face Bernard Tomic in the second round.