Petra Kvitova beats Caroline Wozniaki 2-1 at 2018 WTA Qatar Open

Caroline Wozniaki of Denmark serves during the single's semifinal match against Petra Kvitova of the Czech Republic at the 2018 WTA Qatar Open in Doha, Qatar, on Feb. 17, 2018. Petra Kvitova won 2-1. (Xinhua/Nikku)