Tsvetana Pironkova of Bulgaria plays a shot to Petra Kvitova of the Czech Republic during their women's singles match at the Sydney International tennis tournament in Sydney, Thursday, Jan. 9, 2014.(AP Photo/Rick Rycroft)
Petra Kvitova of the Czech Republic wipes her forehead while playing Tsvetana Pironkova of Bulgaria during their women's singles match at the Sydney International tennis tournament in Sydney, Thursday, Jan. 9, 2014.(AP Photo/Rick Rycroft)