WTA YEC 2013: Serena, Aga, Petra and Angie in Tough Group

(L-R) Sara Errani of Italy, Agnieszka Radwanska of Poland, Petra Kvitova of Czech Republic,
Serena Williams of USA, Victoria Azarenka of Belarus, Li Na of China, Jelena Jankovic of Serbia,
and Angelique Kerber of Germany pose with the Billie Jean King trophy for the official photo of the
TEB BNP Paribas WTA Championships-Istanbul

The 2013 Year-End Championships of the WTA Tour begin on Tuesday in Istanbul. The eight players who have qualified have been split into two groups of four. The Red Group consists of Serena Williams, Agnieska Radwanska, Petra Kvitova and Angelique Kerber.  The White Group consists of Victoria Azarenka, Li Na, Jelena Jankovic and Sara Errani. The two groups play 3 round robin matches against each other with the top 2 players qualifying for the semifinal matches against players from the other group (which are elimination rounds), the winners who will meet in the final.

Tuesday features Azarenka versus Errani, Williams versus Kerber and Radwanska versus Kvitova.
Serena won the title last year and has already won 10 titles in 2013 but would love to make it 11.