The former world No.1 pocketed a crucial break to complete the third set 6-4.

Meanwhile, Russian veteran Elena Dementieva secured a straight sets win over Spanish Anabel Medina Garrigues in 6-2, 7-6(3).

In the men's singles, British fourth seed Andy Murray resumed his unfinished match against Argentinean Juan Ignacio Chela from 6- 2, 5-5, then lost the second set after tiebreak.

But the Australian runner-up pulled himself together to wrap up in 6-3, 6-2.

French 13th seed Gael Monfils failed to hold off the comeback of Fabio Fognini, losing to the Italian 2-6, 4-6, 7-5, 6-4, 9-7.

When the fifth competition day concluded due to darkness, four- time French Open champion Justine Henin from Belgium leads Klara Zakopalova of Czech Republic in 6-3, 3-2. Russia's 12th seed Maria Sharapova is ahead of Belgian Kirsten Flipkens in 6-3, 2-2.

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