28 July,2013 02:48 AM IST | | AFP
Radwanska, ranked fourth in the world and seeking her third title of 2013 after triumphs in Auckland and Sydney, had to battle to subdue her 40th-ranked opponent in two hours and 14 minutes.
Radwanska next faces fourth-seeded American Jamie Hampton, a 6-4, 6-3 winner over Russianu00a0Vera Dushevina.
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