She will play Kaia Kanepi of Estonia in the last eight with the other quarterfinal between Bojana Jovanovski and Petra Martic.

CNN: STORY HIGHLIGHTS

The women's 2011 winner Sam Stosur was drawn against Croatia's Petra Martic, with top seed Victoria Azarenka playing world No. 74 Alexandra Panova.

CNN: Tennis legends tip Murray for grand slam glory at U.S. Open

Baltacha had enjoyed her first-ever main draw win in the tournament when she beat Petra Martic in round one, but Kvitova proved just too strong.

BBC: Elena Baltacha beaten by Petra Kvitova at US Open

The 27-year-old recovered from a 2-6 7-5 6-3 first round defeat by Petra Martic at the All England Club to end the year as world number 55.

BBC: Wimbledon slump rocked Elena Baltacha

The world No. 19 was leading 6-1 4-1 when Suarez Navarro retired due to a back injury and will face either Petra Martic, from Croatia, or the Czech Republic's Petra Cetkovska in round three.

CNN: STORY HIGHLIGHTS

China's Li Na, the 2011 French Open champion, quickly wrapped up a 6-3 6-1 win over Ksenia Pervak from Kazakhstan while Sabine Lisicki, the German No. 15 seed, recorded a 6-4 6-2 victory over Petra Martic.

CNN: Venus Williams crashes out in Wimbledon first round

Hungary's Agnes Szavay walked into the second round when Olga Govortsova of Belarus retired hurt while trailing 6-3 1-0, and will face third seed Yanina Wickmayer in the second round if the Belgian beats Croatian wildcard Petra Martic.

CNN: Safina backs out of Dubai appearance

Twelfth seed Agnieszka Radwanska enjoyed a relatively comfortable passage into the third round with a 6-3 6-4 win over Croatia's Petra Martic, and the Pole will play Simona Halep after the Romanian beat Russia's 24th seed Alisa Kleybanova 6-4 7-6 (7-2).

BBC: Australian Open: Seventh seed Jelena Jankovic falls