Women's tennis rankings

WTA singles rankings as of 25 May 2015

1. Serena Williams (US)

2. Maria Sharapova (Rus)

3. Simona Halep (Rom)

4. Petra Kvitova (Cze)

5. Caroline Wozniacki (Den)

6. Eugenie Bouchard (Can)

7. Ana Ivanovic (Ser)

8. Carla Suarez Navarro (Spa)

9. Ekaterina Makarova (Rus)

10. Andrea Petkovic (Ger)

11. Angelique Kerber (Ger)

12. Karolina Pliskova (Cze)

13. Lucie Safarova (Cze)

14. Agnieszka Radwanska (Pol)

15. Venus Williams (US)

16. Madison Keys (US)

17. Sara Errani (Ita)

18. Svetlana Kuznetsova (Rus)

19. Sabine Lisicki (Ger)

20. Garbine Muguruza (Spa)

Britons in top 300:

45. Heather Watson

143. Johanna Konta

238. Naomi Broady

285. Katy Dunne