Women's tennis rankings

WTA singles rankings as of 19 January 2015

1. Serena Williams (US)

2. Maria Sharapova (Rus)

3. Simona Halep (Rom)

4. Petra Kvitova (Cze)

5. Ana Ivanovic (Ser)

6. Agnieszka Radwanska (Pol)

7. Eugenie Bouchard (Can)

8. Caroline Wozniacki (Den)

9. Angelique Kerber (Ger)

10. Dominika Cibulkova (Svk)

11. Ekaterina Makarova (Rus)

12. Flavia Pennetta (Ita)

13. Andrea Petkovic (Ger)

14. Sara Errani (Ita)

15. Jelena Jankovic (Ser)

16. Lucie Safarova (Cze)

17. Carla Suarez Navarro (Spa)

18. Venus Williams (US)

19. Alize Cornet (Fra)

20. Karolina Pliskova (Cze)

Britons in top 300:

38. Heather Watson

144. Johanna Konta

168. Naomi Broady

295. Katy Dunne

300. Emily Webley-Smith