Azarenka, of Belarus, defeated Varvara Lepchenko of the United States 6-2, 6-2.
Third-seeded Czech Lucie Safarova beat Britain's Melanie South 6-2, 6-2; fourth-seeded Anne Keothavong of England beat Italy's Maria Elena Camerin 3-6, 6-3, 6-1; sixth-seeded German Sabine Lisicki beat Russian Ekaterina Bychkova 6-3, 6-3; and Dutch qualifier Michaella Krajicek beat seventh-seeded Russian Alla Kudryavtseva 6-1, 6-4.
Eighth-seeded Pauline Parmentier defeated fellow Frenchwoman Julie Coin 7-6 (8-6), 4-6, 6-1.
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