Today's fourth-round play at the All England Club produced more upsets at the top of the women's seedings but also offered more convincing wins from the champions and title contenders.Second-seeded Jelena Jankovic, hobbled by a knee injury, fell 6-3, 6-2 to Tamarine Tanasugarn. No. 4 Svetlana Kuznetsova lost 6-4, 1-6, 7-5 to 19-year-old Agnieszka Radwanska.
With top-seeded Ana Ivanovic and No. 3 Maria Sharapova eliminated last week, none of the top-four seeded women reached the quarters. It's the first time that's happened at any Grand Slam tournament in the 40-year history of the Open era. Only three of the top 14 seeded women are left, and two of them are Serena and Venus Williams, seeded sixth and seventh. (Read more Serena Williams stories.)