Paris - Simona Halep moved back into the world's top five in the latest WTA rankings released on Monday, after claiming her first title in over a year at the Madrid Open.
Australian Open champion Angelique Kerber has retaken the world number two spot from Agnieszka Radwanska despite a first-match defeat in Spain, after Poland's Radwanska also bowed out early to eventual runner-up Dominika Cibulkova.
Serena Williams retains her substantial lead at the top of the rankings, although it has been cut slightly after she withdrew from the Madrid tournament because of a virus.
Swiss Timea Bacsinszky jumps into the top 10 after reaching the last 16.
WTA top 20
1. Serena Williams (USA) 8 235 pts
2. Angelique Kerber (GER) 5 740 (+1)
3. Agnieszka Radwanska (POL) 5 665 (-1)
4. Garbine Muguruza (ESP) 4 847
5. Simona Halep (ROM) 4 650 (+2)
6. Victoria Azarenka (BLR) 4 530 (-1)
7. Roberta Vinci (ITA) 3 505 (+1)
8. Belinda Bencic (SUI) 3 320 (+2)
9. Petra Kvitova (CZE) 3 067 (-3)
10. Timea Bacsinszky (SUI) 3 065 (+5)
11. Carla Suarez Navarro (ESP) 3 065
12. Maria Sharapova (RUS) 3 041 (-3)
13. Flavia Pennetta (ITA) 2 964 (+1)
14. Venus Williams (USA) 2 931 (+2)
15. Lucie Safarova (CZE) 2 843 (+2)
16. Ana Ivanovic (SRB) 2 530 (+1)
17. Elina Svitolina (UKR) 2 475 (+2)
18. Sara Errani (ITA) 2 450
19. Svetlana Kuznetsova (RUS) 2 450 (-7)
20. Karolina Pliskova (CZE) 2 420