Berlin - Serena Williams remains top of the women's tennis rankings in an unchanged top 10 released on Monday by the WTA Tour.
The US player has 9 231 points to stay clear of China's Li Na on 6 960 and Romania's Simona Halep on 6 960.
Wimbledon champion Petra Kvitova is fourth while five-time Grand Slam winner Maria Sharapova is sixth.
WTA Top 10:
1. Serena Williams, United States, 9 231 points
2. Li Na, China, 6 960
3. Simona Halep, Romania, 6 785
4. Petra Kvitova, Czech Republic, 6 070
5. Agnieszka Radwanska, Poland, 5 130
6. Maria Sharapova, Russia, 4 881
7. Eugenie Bouchard, Canada, 4 460
8. Angelique Kerber, Germany, 4 365
9. Jelena Jankovic, Serbia, 3 900
10. Victoria Azarenka, Belarus, 3 812