Radwanska delighted with opening performance

Agnieszka Radwanska upset the odds to inflict the first surprise of the WTA Championships with a 6-3 6-2 win over Petra Kvitova.

The Pole race into a 3-0 lead in the opening match of the season-ending tournament before Kvitova hit back after saving four break points in game four to level at 3-3. However, Kvitova struggled on serve throughout as Radwanska recovered her game to take the next three and the first set. Things did not improve for Kvitova on serve in the second set as she lost all four service games as Radwanska eased to an opening win, with the Pole happy with her all-round game. "I'm just very happy about my performance," Radwanska said. "The first match is always tough and adjusting to a new surface is never easy, but I was playing really well from the beginning to the end of the match. "It was still a little bit up and down today. There were a lot of breaks of serve in the match - the serve should be a big weapon, and it wasn't in this match! But I just stayed focused and I'm happy I closed this match out in two sets." Defending champion Kvitova had won 25 consecutive matches on indoor hardcourts but her first defeat (at the fourth attempt) to Radwanska has put her under pressure to make the semi-finals with games against Maria Sharapova and Sara Errani to come.