Henin's loss to Tathiana Garbin in the second round was her only defeat at the tournament between 2002 and 2010.
Zvonareva lost in the first round to the wildcard team of Jelena Janković and Tathiana Garbin.
Also present in the field were 2005 Estoril titlist Lucie Šafářová, 2000 Estoril semifinalist Tathiana Garbin, Klára Zakopalová, Sofia Arvidsson and Camille Pin.