Flavia Pennetta added another chapter to her comeback story today when she defeated Katarina Srebotnik, 7-5, 6-2, to reach the semifinals of the Zurich Open. Anabel Medina Garrigues also advanced when her opponent, Victoria Azarenka, retired from play because of a right shoulder injury. Medina Garrigues's second round opponent, Vera Zvonareva, also retired in the middle of their match.
Meanwhile, Venus Williams defeated Francesca Schiavone, 6-3, 6-3, and Ana Ivanovic defeated Petra Kvitova, 6-1, 6-4.
In doubles, the team of Groenefeld and Schnyder continued to rise as they defeated 2nd seeds Srebotnik and Sugiyama, 6-4, 0-6, 10-8.