QUEBEC CITY - Second-seeded Yanina Wickmayer of Belgium and third-seeded Mona Barthel of Germany were each first-round winners Monday at the $220,000 Bell Challenge tennis event.

Alison Riske broke Wickmayer's first service game in the night session, but the American was otherwise no match for Wickmayer, who converted 5-of-6 break opportunities on the indoor carpet at PEPS Laval University to win 6-3, 6-3.

Barthel had a much difficult time moving on, as she survived Heather Watson of Great Britain, 6-7 (5-7), 7-6 (7-5), 6-1, in two hours, 38 minutes.

An upset came when German Annika Beck took out fifth-seeded Swiss Romina Oprandi 6-1, 7-6 (13-11).

Also advancing on Day 1 was another German, Tatjana Malek, who topped American Alexa Glatch 7-6 (7-3), 6-3.

The top seed here is Slovak Dominika Cibulkova. Czech Barbora Zahlavova Strycova, seeded sixth this year, defeated New Zealand's Marina Erakovic in last year's Quebec City finale.

This week's champion will earn $37,000.