Stosur won the match in straight sets to reach the quarterfinals , where she lost a tight match to Lucie Hradecka in two tiebreaks .
Stosur 's third - round opponent was Petra Cetkovska .
Stosur won the match in straight sets to reach the quarterfinals , where Stosur lost a tight match to Lucie Hradecka in two tiebreaks .
Stosur 's third - round opponent was Petra Cetkovska .