Updated

Anna-Lena Friedsam of Germany rallied to defeat third-seeded Dominika Cibulkova 2-6, 6-3, 6-4 in the first round of the Generali Ladies on Wednesday, while No. 2 Ana Ivanovic pulled out injured.

The 94th-ranked Friedsam missed two match points while serving at 5-2 but converted the fourth chance in her next service game.

Two-time former champion Ivanovic withdrew with a hip complaint one day after receiving medical treatment during her first-round win over Pauline Parmentier of France.

"This injury has been plaguing me the whole summer, and it got worse during the recent tournaments in Asia," Ivanovic said in a statement on the tournament website. "I am sorry but I can't play on."

The eighth-ranked Ivanovic, who won the indoor hard-court event in Austria in 2008 and 2010 and reached the final last year, has qualified for the WTA Finals in Singapore.

Her withdrawal advanced Madison Brengle of the United States to her first career quarterfinals.

In second-round play, Camila Giorgi of Italy saved 10 of 11 break points while defeating Ons Jabeur of Tunisia 6-3, 6-2 to set up a quarterfinal against Marina Erakovic of New Zealand.

Erakovic had six aces to earn her first quarterfinal since reaching the semifinals in Washington in July.