Down 1-5 in the first set, Petra Kvitova found her way back and defeated Agniszka Radwanska 7-6, 6-3 today in the final Red Group round-robin match in the WTA Championships. If Radwanska had won a set (and she had ample opportunity to win that first one), she would be in the semifinals. As it is, it's Vera Zvonareva who goes to the semifinals, in which she will play Victoria Azarenka.
Azarenka, who--like Kivitova--had already qualified for the semifinals, lost her focus in her match against Marion Bartoli. Bartoli, after over two and a half hours, won 5-7, 6-4, 6-4. The Frenchwoman, substituting for Maria Sharapova, served for the first set, but was broken. There is speculation, of course, that Azarenka simply didn't want to put forth the effort to win since she was assured of being in the semifinals.
In the White Group, Sam Stosur defeated Li Na yet again (she now has a 6-0 record against her); Li won only one game. Stosur will play Kvitova in the semifinals.
Zvonareva has a 6-3 record against Azarenka. Kvitova has a 2-0 record against Stosur.