Denmark's Caroline Wozniacki consolidated her position at the top of the latest WTA rankings courtesy of her third title at Charleston.
The world number one launched her clay court season with a victory over Elena Vesnina in the Family Circle Cup final.
Belarus Victoria Azarenka climbed into the top five for the first time in her career after winning in Marbella.
1. Caroline Wozniacki (DEN) 9930 pts
2. Kim Clijsters (BEL) 8115
3. Vera Zvonareva (RUS) 7815
4. Francesca Schiavone (ITA) 5171
5. Victoria Azarenka (BLR) 4630 (+1)
6. Samantha Stosur (AUS) 4606 (-1)
7. Li Na (CHN) 4300
8. Jelena Jankovic (SRB) 4235
9. Maria Sharapova (RUS) 3726
10. Serena Williams (USA) 3035
11. Shahar Peer (ISR) 3030
12. Marion Bartoli (FRA) 2925
13. Svetlana Kuznetsova (RUS) 2900 (+1)
14. Agnieszka Radwanska (POL) 2860 (-1)
15. Venus Williams (USA) 2765
16. Kaia Kanepi (EST) 2760
17. Ana Ivanovic (SRB) 2750
18. Petra Kvitova (CZE) 2743
19. Andrea Petkovic (GER) 2735
20. Flavia Pennetta (ITA) 2570