UPDATE 2-Tennis-WTA Championships women's singles round robin results

Oct 26 (Infostrada Sports) - Results from the WTA Championships Women's Singles Round Robin matches on Friday
RESULTS
Group A
1-Victoria Azarenka(Belarus)beat 8-Li Na(China)7-6(4) 6-3
Group B
4-Agnieszka Radwanska(Poland)beat 7-Sara Errani(Italy)6-7(6) 7-5 6-4
2-Maria Sharapova(Russia)beat 9-Samantha Stosur(Australia)6-0 6-3
STANDINGS
P W L F A Pts
Group A
1. Serena Williams 3 3 0 6 0 6
2. Victoria Azarenka 3 2 1 4 3 4
3. Li Na 3 1 2 2 4 2
4. Angelique Kerber 3 0 3 1 6 0
Group B
1. Maria Sharapova 3 3 0 6 1 6
2. Agnieszka Radwanska 3 2 1 5 3 4
3. Sara Errani 3 1 2 3 5 2
4. Petra Kvitova 1 0 1 0 2 0
5. Samantha Stosur 2 0 2 1 4 0