Kvitová wins first match at WTA Championships

Petra Kvitová beat the world number four Agnieszka Radwanska in her first game at the WTA Championships in Istanbul on Tuesday, with the final score 6:4,6:4. The top Czech female singles tennis star, Kvitová, lost to Radwanska last year at the same stage and eventually pulled out of the championship. Kvitová’s group this year also includes the defending champion Serena Williams and Angelique Kerber.