Kvitova loses in Sydney semis; del Potro advances
Tennis | Jan 09, 2014, 01:22 PM ISTSydney: Second-seeded Petra Kvitova suffered an upset 6-4, 6-3 loss to Bulgarian qualifier Tsvetana Pironkova in the semifinals of the Sydney International on Thursday. Kvitova, the 2011 Wimbledon champion, was broken twice in the first