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Linz - Dominika Cibulkova of Slovakia has routed Katarzyna Piter of Poland 6-0, 6-1 in less than 53 minutes on Thursday to reach the quarter-finals of the Generali Ladies.
Piter, playing in her first main draw of the year, broke the seventh-seeded Cibulkova in the second set for her only game.
In her fourth quarter-final of the season, one-time finalist Cibulkova will take on two-time former champion Ana Ivanovic.
Also, Patricia Mayr-Achleitner of Austria missed two match points at 5-3 in the second set before defeating Maryna Zanevska of Ukraine 6-1, 6-7 (1), 6-4 to set up a quarterfinal against top-seeded Angelique Kerber or Alexandra Cadantu of Romania.
Stefanie Voegele of Switzerland rallied to defeat Karin Knapp of Italy 4-6, 6-2, 7-5 to advance to her third quarterfinal of the season and first since April.
Results from the fourth day of the WTA tournament in Linz on Thursday (x denotes seeding):
Second round:
Sloane Stephens (USA x2) bt Andrea Petkovic (GER) 7-6 (7/1), 4-6, 6-3Stefanie Voegele (SUI) bt Karin Knapp (ITA) 4-6, 6-2, 7-5
Dominika Cibulkova (SVK x7) bt Katarzyna Piter (POL) 6-0, 6-1
Patricia Mayr (AUT) bt Maryna Zanevska (UKR) 6-1, 6-7 (1/7), 6-4
