Kvitova moves on; Stosur, Wozniacki exit Stuttgart

Former Wimbledon champion Petra Kvitova survived her opener, while former U.S. Open titlist Samantha Stosur and former world No. 1 and 2011 Stuttgart runner-up Caroline Wozniacki came up first- round losers Wednesday at the $795,000 Porsche Tennis Grand Prix.

The fifth-seeded Czech left-hander Kvitova popped seven aces before holding off German wild card Annika Beck 7-5, 6-7 (0-7), 6-3 in 2 hours, 26 minutes.

Meanwhile, former No. 1 and 2008 Stuttgart champion Jelena Jankovic of Serbia knocked out the sixth-seeded Aussie Stosur 6-4, 6-4 and gritty Spaniard Carla Suarez Navarro doused the seventh-seeded Dane Wozniacki 7-6 (8-6), 6-1 on the red clay at Porsche Arena. Stosur was the runner-up at this event in 2010.

German favorite and 2011 champion Julia Goerges was leading Kirsten Flipkens 6-2, 2-1 when the Belgian retired on Day 2, while American qualifier Bethanie Mattek-Sands drilled Belgian Yanina Wickmayer 6-2, 6-1.

In some other first-round action, Czech Lucie Safarova handled German Mona Barthel 6-4, 6-1, Anastasia Pavlyuchenkova overcame fellow Russian Ekaterina Makarova 6-7 (5-7), 7-5, 6-4, and Kazakhstan's Yaroslava Shvedova topped Italian Roberta Vinci 6-4, 6-2. Vinci was a titlist in Poland just two weeks ago by beating Kvitova in the final.

This week's top seed is new Porsche global brand ambassador and reigning Stuttgart champion Maria Sharapova, who beat Victoria Azarenka in last year's marquee finale.

Several stars will take to the courts on Thursday, including the top-seeded former No. 1 Sharapova, second-seeded Aussie Open runner-up Li Na, French Open runner-up Sara Errani, and Kvitova. Sharapova will face Czech Lucie Safarova to open her stay.

The 2013 Stuttgart champ will collect $130,000 and a new Porsche 911 Carrera.