WTA rankings on Monday (Last week's positions in brackets):

                                      points

1. (1)Serena Williams (United States) 12,260

2. (2) Victoria Azarenka (Belarus) 9,505

3. (3) Maria Sharapova (Russia) 7,866

4. (4) Agnieszka Radwanska (Poland) 6,335

5. (6) Li Na (China) 5,565

6. (5) Sara Errani (Italy) 4,325

7. (7) Marion Bartoli (France) 3,746

8. (8) Caroline Wozniacki (Denmark) 3,645

9. (9) Angelique Kerber (Germany) 3,420

10. (12) Jelena Jankovic (Serbia) 3,245

11. (10) Petra Kvitova (Czech Republic) 3,170

12 (13) Roberta Vinci (Italy) 3,065

13. (16) Sloane Stephens (United States) 3,045

14. (14) Kirsten Flipkens (Belgium) 2,806

15. (20) Carla Suarez Navarro (Spain) 2,775

16. (18) Sabine Lisicki (Germany) 2,770

17. (15) Ana Ivanovic (Serbia) 2,720

18. (11) Samantha Stosur (Australia) 2,715

19. (19) Simona Halep (Romania) 2,630

20. (17) Maria Kirilenko (Russia) 2,620