Serena Williams maintained top spot ahead of Maria Sharapova in the WTA women's tennis rankings Monday.
The leading five remain unchanged, while Agnieszka Radwanska of Poland improved a place to sixth, swapping places with Canada's Eugenie Bouchard in the only change in the top 10.
WTA top 10 as of October 13 (previous ranking in parenthesis):
1. (1) Serena Williams, United States, 8,645 points
2. (2) Maria Sharapova, Russia, 6,680
3 (3) Simona Halep, Romania, 6,246
4. (4) Petra Kvitova, Czech Republic, 6,126
5. (5) Li Na, China, 5,020
6. (6) Agnieszka Radwanska, Poland, 4,650
7. (6) Eugenie Bouchard, Canada, 4,523
8. (8) Ana Ivanovic, Serbia, 4,435
9 (9) Caroline Wozniacki, Denmark, 4,215
10. (10) Angelique Kerber, Germany, 3,745
