Paris - Ashleigh Barty remained world No 1 after the first WTA rankings of 2020 were released on Monday, as the Roland Garros champion prepares for a crack at this month's Australian Open.
Barty enjoyed a stellar 2019, winning the French Open and the WTA Finals on her way to becoming the first Australian women's number one since Evonne Goolagong Cawley in 1976.
She is also aiming to become the first Australian to win her home Grand Slam since Christine O'Neil in 1976 after taking part in tournaments in Brisbane and Adelaide.
On Sunday Barty said she will donate all her winnings from this week's Brisbane International to the Red Cross to help the victims of Australia's bushfire crisis, which has ravaged huge swathes of the country.
Simona Halep moves up to third without playing thanks to Naomi Osaka losing points due to the later start this year of the Brisbane tournament which has been put back a week.
Japan's Osaka will enter the fray on Tuesday looking to regain those lost points at a tournament where she made the semi-finals last year.
Top 20 in the latest WTA Tour rankings:
1. Ashleigh Barty (AUS) 7 851
2. Karolina Pliskova (CZE) 5 525
3. Simona Halep (ROU) 5 462
4. Naomi Osaka (JPN) 5 311
5. Elina Svitolina (UKR) 5 075
6. Bianca Andreescu (CAN) 4 935
7. Petra Kvitova (CZE) 4 721
8. Belinda Bencic (SUI) 4 685
9. Kiki Bertens (NED) 4 245
10. Serena Williams (USA) 3 935
11. Aryna Sabalenka (BLR) 2 940
12. Johanna Konta (GBR) 2 825
13. Madison Keys (USA) 2 767
14. Sofia Kenin (USA) 2 740
15. Petra Martic (CRO) 2 617
16. Marketa Vondrousova (CZE) 2 390
17. Elise Mertens (BEL) 2 290
18. Angelique Kerber (GER) 2 175
19. Alison Riske (USA) 2 085
20. Donna Vekic (CRO) 2 080