Paris - Japan's US Open champion Naomi Osaka rose to fourth place in the latest WTA Tour rankings released on Monday on the strength of her outstanding form in recent weeks.
Romania's Simona Halep tops the table ahead of second-placed Caroline Wozniacki of Denmark with Germany's Angelique Kerber holding onto third place.
Osaka, aged 20, who reached the semi-finals of the China Open last week, moves up from sixth to fourth place on 4 770 points and is closing in on Kerber, who has 5 400 points.
The rising Japanese star become only the second Asian woman to win a Grand Slam singles title with last month's stunning win over Serena Williams in the US Open final.
Top 20 in latest WTA Tour rankings:
1. Simona Halep (ROU) 7 421
2. Caroline Wozniacki (DEN) 6 490
3. Angelique Kerber (GER) 5 400
4. Naomi Osaka (JPN) 4 770
5. Elina Svitolina (UKR) 4 350
6. Karolina Pliskova (CZE) 4 345
7. Petra Kvitova (CZE) 4 255
8. Sloane Stephens (USA) 4 022
9. Julia Goerges (GER) 3 785
10. Kiki Bertens (NED) 3 740
11. Aryna Sabalenka (BLR) 3 265
12. Anastasija Sevastova (LAT) 3 240
13. Garbine Muguruza (ESP) 3 170
14. Daria Kasatkina (RUS) 3 150
15. Elise Mertens (BEL) 3 115
16. Caroline Garcia (FRA) 3 045
17. Serena Williams (USA) 2 976
18. Jelena Ostapenko (LAT) 2 863
19. Madison Keys (USA) 2 816
20. Ashleigh Barty (AUS) 2 605