Li Na of China signs autographs after her BNP Paribas Showdown friendly tennis match against Samantha Stosur of Australia in Hong Kong, March 3, 2014. [Photo/Agencies]

Standings from the WTA Tour singles 

1 (1) Serena Williams (US) 12660

2 (2) Li Na (China) 6795

3 (3) Agnieszka Radwanska (Poland) 5705

4 (4) Victoria Azarenka (Belarus) 5681

5 (5) Maria Sharapova (Russia) 5206

6 (6) Angelique Kerber (Germany) 4490

7 (7) Simona Halep (Romania) 4435

8 (8) Jelena Jankovic (Serbia) 4380

9 (9) Petra Kvitova (Czech Republic) 4365

10 (10) Sara Errani (Italy) 4015

11 (13) Dominika Cibulkova (Slovakia) 3335

12 (11) Caroline Wozniacki (Denmark) 3185

13 (12) Ana Ivanovic (Serbia) 3155

14 (14) Roberta Vinci (Italy) 2940

15 (16) Sabine Lisicki (Germany) 2650

16 (15) Carla Suarez Navarro (Spain) 2635 1

7 (17) Samantha Stosur (Australia) 2605

18 (18) Sloane Stephens (US) 2415

19 (19) Eugenie Bouchard (Canada) 2379

20 (20) Kirsten Flipkens (Belgium) 2285

21 (21) Flavia Pennetta (Italy) 2260

22 (22) Anastasia Pavlyuchenkova (Russia) 2180

23 (23) Alize Cornet (France) 2160

24 (24) Ekaterina Makarova (Russia) 2065

25 (25) Maria Kirilenko (Russia) 2046

26 (26) Kaia Kanepi (Estonia) 2035

27 (27) Sorana Cirstea (Romania) 1980

28 (28) Lucie Safarova (Czech Republic) 1820

29 (32) Klara Zakopalova (Czech Republic) 1745

30 (30) Svetlana Kuznetsova (Russia) 1598

31 (29) Venus Williams (US) 1577

32 (36) Garbine Muguruza Blanco (Spain) 1563

33 (31) Jamie Hampton (US) 1532

34 (33) Daniela Hantuchova (Slovakia) 1482

35 (34) Elena Vesnina (Russia) 1465

36 (35) Magdalena Rybarikova (Slovakia) 1385

37 (37) Andrea Petkovic (Germany) 1360

38 (38) Madison Keys (US) 1335

39 (39) Yvonne Meusburger (Austria) 1307

40 (41) Peng Shuai (China) 1270

41 (42) Bojana Jovanovski (Serbia) 1265

42 (50) Zhang Shuai (China) 1253

43 (44) Elina Svitolina (Ukraine) 1233

44 (43) Francesca Schiavone (Italy) 1215

45 (46) Alison Riske (US) 1200

46 (47) Tsvetana Pironkova (Bulgaria) 1195

47 (48) Kurumi Nara (Japan) 1190

48 (49) Annika Beck (Germany) 1175

49 (45) Karin Knapp (Italy) 1167

50 (52) Stefanie Voegele (Switzerland) 1125