Fifth-seeded Yanina Wickmayer posted a first- round victory Monday at the $740,000 Bank of the West Classic tennis event.

The Belgian Wickmayer snuck past Taipei's Kai-Chen Chang 7-5, 2-6, 7-5 on the hardcourts at Stanford's Taube Family Tennis Stadium.

This week's top seed is Wimbledon champion Serena Williams, who beat Marion Bartoli, this week's second seed, in last year's Stanford finale. Bartoli titled here in 2009 and was also a runner-up in 2008.