Paris - American Serena Williams continued to dominate the WTA rankings, the latest list published on Monday.
China's Li Na, who has announced her retirement, finished her career in fifth spot.
WTA rankings as of September 22
1. Serena Williams (USA) 9 430
2. Simona Halep (ROM) 6 160
3. Petra Kvitova (CZE) 5 926
4. Maria Sharapova (RUS) 5 575
5. Li Na (CHN) 5,270 (+1)
6. Agnieszka Radwanska (POL) 5 200 (-1)
7. Caroline Wozniacki (DEN) 4 500 (+2)
8. Angelique Kerber (GER) 4 480
9. Eugenie Bouchard (CAN) 4 433
10. Ana Ivanovic (SRB) 4 180
11. Jelena Jankovic (SRB) 3 655
12. Sara Errani (ITA) 3 215
13. Dominika Cibulkova (SVK) 3 106
14. Ekaterina Makarova (RUS) 2 845
15. Lucie Safarova (CZE) 2 785
16. Flavia Pennetta (ITA) 2 651
17. Andrea Petkovic (GER) 2 525
18. Venus Williams (USA) 2 495
19. Carla Suarez (ESP) 2 420
20. Samantha Stosur (AUS) 2 110