Naomi Osaka climbed one place to number nine in the new WTA rankings, which were released on Monday ahead of the US Open, after withdrawing from the Western and Southern Open final at the weekend. Osaka, who is scheduled to meet Japan’s Misaki Doi in the first round at Flushing Meadows, pulled out of Saturday’s final because of a left hamstring injury. Her withdrawal handed the title to Victoria Azarenka who climbed 32 places to 27th in the world. Australian Ashleigh Barty retains the top spot although neither she nor world number two Simona Halep are taking part in the US Open which is being staged without spectators in a Covid-19 quarantine bubble.

Karolina Pliskova, the world number three, is the highest ranked player and top seed going into the second Grand Slam tournament of the year.

Serena Williams, 38, who is searching for her 24th Grand Slam singles title, rises one place to eighth in the world.

Latest WTA rankings:

1. Ashleigh Barty (AUS) 8717 pts

2. Simona Halep (ROM) 6356

3. Karolina Pliskova (CZE) 5205

4. Sofia Kenin (USA) 4590

5. Elina Svitolina (UKR) 4580

6. Bianca Andreescu (CAN) 4555

7. Kiki Bertens (NED) 4335

8. Serena Williams (USA) 4080 (+1)

9. Naomi Osaka (JPN) 4020 (+1)

10. Belinda Bencic (SUI) 4010 (-2)

11. Aryna Sabalenka (BLR) 3615

12. Petra Kvitova (CZE) 3566

13. Johanna Konta (GBR) 3152 (+2)

14. Madison Keys (USA) 2962 (-1)

15. Petra Martic (CRO) 2850 (-1)

16. Garbine Muguruza (ESP) 2711

17. Elena Rybakina (KAZ) 2471

18. Elise Mertens (BEL) 2360 (+4)

Promoted

19. Marketa Vondrousova (CZE) 2308 (-1)

20. Alison Riske (USA) 2256 (-1)