Vinci eases through in Estoril
Top seed Roberta Vinci of Italy dispatched Portuguese hope Maria Joao Koehler 6-2, 6-0 but Italy's Karin Knapp upset second seed Maria Kirilenko 1-6, 6-1, 7-5 at the Estoril Open on Wednesday.
The 2005 winner Zheng Jie of China, the fifth seed, lost 6-4, 6-1 to Kazak Galina Voskoboeva.
Sixth seed Kaia Kanepi of Estonia put out the last American in the field by defeating Vania King 6-3, 6-4 while seventh-seeded Russian Nadia Petrova reached the quarterfinals as Australian Jarmila Gajdosova retired hurt after losing the opening set 7-6 (7/2).
The same fate befell eighth seed Polona Hercog as the Slovenian had to quit trailing 6-4, 3-0, against Carla Suarez Navarro of Spain.