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