Women's tennis rankings

WTA singles rankings as of 11 May 2015

1. Serena Williams (US)

2. Simona Halep (Rom)

3. Maria Sharapova (Rus)

4. Petra Kvitova (Cze)

5. Caroline Wozniacki (Den)

6. Eugenie Bouchard (Can)

7. Ana Ivanovic (Ser)

8. Ekaterina Makarova (Rus)

9. Andrea Petkovic (Ger)

10. Carla Suarez Navarro (Spa)

11. Angelique Kerber (Ger)

12. Karolina Pliskova (Cze)

13. Agnieszka Radwanska (Pol)

14. Lucie Safarova (Cze)

15. Sara Errani (Ita)

16. Venus Williams (US)

17. Madison Keys (US)

18. Svetlana Kuznetsova (Rus)

19. Elina Svitolina (Ukr)

20. Jelena Jankovic (Ser)

Britons in top 300:

41. Heather Watson

143. Johanna Konta

237. Naomi Broady

284. Katy Dunne