Paris - Karolina Pliskova jumped one spot in the women's tennis rankings on Monday, swapping places with the woman she beat the day before in the Tokyo final, Naomi Osaka.
Romanian Simona Halep still heads the top 20, a long way ahead of the Dane Caroline Wozniacki.
The German Julia Goerges climbed one place and into the top 10, just above Dutchwoman Kiki Bertens, who also rose one spot after winning the Seoul title on Sunday.
Top 20 in the latest WTA Tour rankings:
1. Simona Halep (ROU) 8 061
2. Caroline Wozniacki (DEN) 5 506
3. Angelique Kerber (GER) 5 295
4. Caroline Garcia (FRA) 4 725
5. Petra Kvitova (CZE) 4 585
6. Elina Svitolina (UKR) 4 455
7. Karolina Pliskova (CZE) 4 475
8. Naomi Osaka (JPN) 4 390
9. Sloane Stephens (USA) 3 912
10. Julia Goerges (GER) 3 730
11. Kiki Bertens (NED) 3 630
12. Jelena Ostapenko (LAT) 3 537
13. Darya Kasatkina (RUS) 3 355
14. Garbine Muguruza (ESP) 3 200
15. Elise Mertens (BEL) 3 170
16. Serena Williams (USA) 2 976
17. Ashleigh Barty (AUS) 2 850
18. Madison Keys (USA) 2 692
19. Anastasija Sevastova (LAT) 2 600
20. Aryna Sabalenka (BLR) 2 320