text: Pierce, Hantuchova win; Zvonareva driven out of Porsche event Filderstadt, Germany (Sports Network) - Former champion Mary Pierce of France and 2002 runner-up Daniela Hantuchova of Slovakia were opening-round winners on Tuesday, but sixth-seeded Russian Vera Zvonareva was an upset victim at the \$650,000 Porsche 
inputs: Pierce, Hantuchova win; Zvonareva driven out of Porsche event Filderstadt, Germany (Sports Network) - Former champion Mary Pierce of France and 2002 runner-up Daniela Hantuchova of Slovakia were opening-round winners on Tuesday, but sixth-seeded Russian Vera Zvonareva was an upset victim at the \$650,000 Porsche 