Also advancing on the women's side were No. 3 Amelie Mauresmo, No. 7 Patty Schnyder, No. 12 Anastasia Myskina, No. 16 Nicole Vaidisova and No. 20 Flavia Pennetta.
Seven of the seeded women lost yesterday: Pierce, Ivanovic, No. 19 Dinara Safina, No. 22 Anna-Lena Groenefeld, No. 27 Marion Bartoli and No. 31 Gisela Dulko.
Men's winners included No. 5 Nikolay Davydenko, a potential quarterfinal opponent for Federer, No. 6 Guillermo Coria, No. 12 Dominik Hrbaty, No. 15 Juan Carlos Ferrero, No. 21 Nicolas Kiefer, No. 23 Igor Andreev and No. 25 Sebastien Grosjean.
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