No. 19 Marin Cilic of Croatia became the 2011 French Open's first upset victim on the men's side, falling 7-6 (5), 6-4, 6-4 to Spain's Ruben Ramirez Hidalgo. Most other ranked players at Roland Garros won handily, with No. 7 David Ferrer, No. 14 Stanislas Wawrinka, No. 17 Jo-Wilfried Tsonga, No. 30 Guillermo Garcia-Lopez and No. 31 Sergiy Stakhovsky all moving past the first round.
The women's side saw a pair of upsets, with No. 18 Flavia Pennetta and No. 19 Shahar Peer losing to Varvara Lepchenko and Maria Jose Martinez Sanchez respectively. No. 8 Samantha Stosur, No. 10 Jelena Jankovic, No. 13 Svetlana Kuznetsova, No. 14 Anastasia Pavlyuchenkova, No. 17 Julia Goerges and No. 32 Tsvetana Pironkova remain in contention after picking up day-one victories.
Rafael Nadal and Roger Federer are scheduled to join the action on Monday. Nadal takes on John Isner, and Federer is up against Feliciano Lopez.
Track your favorite players at Roland Garros with our full 2011 French Open TV schedule.