WTA Rankings: Serena still on top

American tennis ace Serena Williams has maintained her No 1 spot, while German Angelique Kerber has slipped to the third in the latest women's tennis world rankings issued by the WTA.

Williams remains on top with 8, 625 points and maintains a comfortable advantage of 2,850 over Poland's Agnieszka Radwanska, who retains her second spot despite not featuring at the Volvo Car Open.

Meanwhile, Kerber suffered a setback in rankings after her semi-final exit at Charleston due to a viral illness.

The current WTA top 10 are:

1. Serena Williams

2. Agnieszka Radwanska

3. Angelique Kerber

4. Garbine Muguruza

5. Victoria Azarenka

6. Simona Halep

7. Petra Kvitova

8. Roberta Vinci

9. Maria Sharapova

10. Belinda Bencic