MONTREAL (AP) - Maria Sharapova withdrew from the Rogers Cup on Wednesday because of a stomach ailment.
The second-ranked Sharapova told organizers she picked up the bug at the London Olympics, where she lost the final to Serena Williams. Sharapova was replaced in the draw by Galina Voskoboeva.
In second-round matches, eighth-seeded Sara Errani beat Jana Cepelova 6-3, 6-2, and 16th-seeded Lucie Safarova edged Sesil Karatantcheva 6-4, 6-4.
In first-round play, 18-year-old Canadian Eugenie Bouchard beat Shahar Peer 3-6, 6-2, 7-5. Americans Christina McHale and Varvara Lepchenko also won first-round matches. McHale beat Arantxa Rus 3-6, 6-1, 6-3, and Lepchenko topped Anastasia Pavlyuchenkova 6-2, 6-3.
McHale will face Voskoboeva in the second round.