Berlin - Olympic bronze medallist Victoria Azarenka of Belarus stayed top of the women's rankings, with no changes to the leading 10.
Azarenka has 8 820 points and stays narrowly ahead of Russian Maria Sharapova, who has 8 720. Agnieszka Radwanska of Poland is third and Olympic winner Serena Williams of the United States fourth.
WTA top 10 as of August 13 (previous ranking in parenthesis):
1. (1) Victoria Azarenka, Belarus, 8 820 points
2. (2) Maria Sharapova, Russia, 8 720
3. (3) Agnieszka Radwanska, Poland, 8 260
4. (4) Serena Williams, United States, 8 045
5. (5) Samantha Stosur, Australia, 6 195
6. (6) Petra Kvitova, Czech Republic, 5 275
7. (7) Angelique Kerber, Germany, 5 225
8. (8) Caroline Wozniacki, Denmark, 4 206
9. (9) Sara Errani, Italy, 3 620
10. (10) Marion Bartoli, France, 3 400