New faces emerged lower down the order with French teenager Oceane Dodin breaking into the top 100 with her first WTA title in Montreal on Sunday.
It was her first ever final and launched the 19-year-old 39 places up the rankings to 93.
WTA top 20
1. Angelique Kerber (GER) 8,730 points
2. Serena Williams (USA) 7,050
3. Garbine Muguruza (ESP) 5,830
4. Agnieszka Radwanska (POL) 5,815
5. Simona Halep (ROM) 4,801
6. Karolina Pliskova (CZE) 4,425
7. Venus Williams (USA) 3,815
8. Carla Suarez (ESP) 3,330
9. Madison Keys (USA) 3,286
10. Svetlana Kuznetsova (RUS) 3,250
11. Victoria Azarenka (BLR) 3,121
12. Dominika Cibulkova (SVK) 3,100
13. Johanna Konta (GBR) 2,865
14. Timea Bacsinszky (SUI) 2,773
15. Roberta Vinci (ITA) 2,595
16. Petra Kvitova (CZE) 2,390
17. Anastasia Pavlyuchenkova (RUS) 2,255
18. Samantha Stosur (AUS) 2,200
19. Elena Vesnina (RUS) 2,114
20. Elina Svitolina (UKR) 2,101