Rawdanska up to fourth in rankings

Paris - In-form Agnieszka Radwanska is up to fourth in the WTA world rankings thanks to her tournament win in Shenzhen.

The Polish player moved ahead of Maria Sharapova, who was forced to pull out in Brisbane due to an arm injury.

Biggest mover of the week was former Australian Open champion Viktoria Azarenka, who climbed six places to 16th on the back of her impressive win in Brisbane.

Serena Williams, who will be the defending champion at the Australian Open later this month, remained well clear at the top despite skipping the Hopman Cup in Perth because of a knee injury.

WTA world top 20

1. Serena Williams (USA) 9 945 pts

2. Simona Halep (ROM) 5 880

3. Garbine Muguruza (ESP) 5 200

4. Agnieszka Radwanska (POL) 4 670 (+1)

5. Maria Sharapova (RUS) 4 542 (-1)

6. Petra Kvitova (CZE) 4 111

7. Angelique Kerber (GER) 3 710 (+3)

8. Flavia Pennetta (ITA) 3 621

9. Lucie Safarova (CZE) 3 590

10. Venus Williams (USA) 3 511

11. Karolina Pliskova (CZE) 3 285

12. Carla Suarez Navarro (ESP) 3 175 (+1)

13. Timea Bacsinszky (SUI) 2 954 (-1)

14. Belinda Bencic (SUI) 2 900

15. Roberta Vinci (ITA) 2 855

16. Viktoria Azarenka (BLR) 2 745 (+6)

17. Madison Keys (USA) 2 600 (+1)

18. Caroline Wozniacki (DEN) 2 571 (-1)

19. Sara Errani (ITA) 2 525 (+1)

20. Elina Svitolina (UKR) 2 465 (-1)