Women's tennis rankings

WTA singles rankings as of 20 April 2015

1. Serena Williams (US)

2. Maria Sharapova (Rus)

3. Simona Halep (Rom)

4. Petra Kvitova (Cze)

5. Caroline Wozniacki (Den)

6. Ana Ivanovic (Ser)

7. Eugenie Bouchard (Can)

8. Ekaterina Makarova (Rus)

9. Agnieszka Radwanska (Pol)

10. Carla Suarez Navarro (Spa)

11. Andrea Petkovic (Ger)

12. Karolina Pliskova (Cze)

13. Lucie Safarova (Cze)

14. Angelique Kerber (Ger)

15. Sara Errani (Ita)

16. Venus Williams (US)

17. Madison Keys (US)

18. Jelena Jankovic (Ser)

19. Sabine Lisicki (Ger)

20. Garbine Muguruza (Spa)

Britons in top 300:

40. Heather Watson

138. Johanna Konta

162. Naomi Broady

274. Katy Dunne