Geneva - Top-seeded Sam Querrey lost his opening match at the rain-hit Geneva Open on Thursday, falling to Guido Pella of Argentina 7-5, 6-7 (6), 7-6 (4).
It was the 13th-ranked American's third straight quick exit from a clay-court event before the French Open begins on Sunday. Querrey also lost to Pella last month in Houston.
Querrey broke the left-handed Pella's serve only once as his record fell to 10-10 this year.
Pella was due back on court in the afternoon for a quarterfinal match against another American, sixth-seeded Steve Johnson.
Johnson also won on Thursday morning, beating qualifier Lukas Rosol of the Czech Republic 6-4, 4-6, 6-3 in the second round.