For the second straight day, a heavily favored American was upset by a player ranked 82nd.

Tsvetana Pironkova of Bulgaria defeated No.2-seeded Venus Williams in straight sets on Tuesday, 6-2, 6-3.
Pironkova dominated the five-time Wimbledon champion at Tuesday's All England Club quarterfinal. The Bulgarian constantly changed the pace on her shots and never allowed Venus to find any rhythm. Pironkova used a mix of spin on her slice and power to frustrate Venus throughout the contest.

Before this year's Wimbledon, Pironkova had never advanced past the second round in 18 previous majors. Pironkova's highest WTA tour ranking was 40 in June 2008.

Although Venus was frustrated all match by Pironkova's change of pace and pinpoint placement, the American beat herself as well. She committed 29 unforced errors compared to Pironkova's six. The American only won 53 percent of her net approaches.