Andrea Petkovic of Germany celebrates after winning a point against Czech Republic's Barbora Zahlavova Strycova during their match at the Brisbane International tennis tournament. (Photo: REUTERS)
Joining Petkovic in the final eight will be 2010 French Open champion Francesca Schiavone of Italy, who beat Galina Voskoboeva of Kazakhstan 6-4, 6-4.
The top-seeded player on the men’s side, Andy Murray, plays his opening match on Tuesday night, followed by a second-round match between defending Australian Open champion Kim Clijsters and former French Open winner Ana Ivanovic.
Top-seeded Samantha Stosur and the player she beat in last year’s U.S. Open final, Serena Williams, won their first-round matches Monday and play their second-round matches on Wednesday.
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