Zurich, Switzerland (Sports Network) - Fifth-seeded Pole Agnieszka Radwanska notched a win, while sixth-seeded heavy Swiss crowd favorite Patty Schnyder was among Tuesday's first-round upset victims at the $600,000 Zurich Open.

The world No. 10 Radwanska rolled past Russian qualifier Vera Dushevina 6-4, 6-1, while Schnyder succumbed to Czech qualifier Petra Kvitova 6-4, 3-6, 6-4 on the indoor hardcourts at Hallenstadion. Schnyder titled here in 2002 and was the runner-up in 2005.

Another upset came when Romanian qualifier Monica Niculescu ousted seventh- seeded Russian Anna Chakvetadze 3-6, 6-3, 6-2.

In other opening-round play, Italian Francesca Schiavone doused Dane Caroline Wozniacki 7-6 (7-3), 6-2, Spaniard Anabel Medina Garrigues grounded Chinese wild card Na Li 6-2, 6-4 and France's Marion Bartoli blitzed struggling Hungarian Agnes Szavay 6-4, 6-0. Bartoli will meet second-seeded French Open champion and Australian Open runner-up Ana Ivanovic in the round of 16.

On Wednesday, third-seeded Wimbledon champion Venus Williams will take on Ukrainian Alona Bondarenko in a second-round affair.

This week's top seed is red-hot world No. 1 Jelena Jankovic, who is seeking her fourth title in four events. She captured her latest title in Moscow last week and was last month's runner-up at the U.S. Open.

This week's winner will claim $95,500.