Naomi Osaka slipped out of the top five in the WTA rankings on Monday while Simona Halep, another former world number one, continued her slide by also dropping three places.
Four-time Grand Slam champion Osaka fell from fifth to eighth as Halep, who married boyfriend Toni Luruc last week in a civil ceremony in her hometown of Constanta, tumbled down to 14th.
Ashleigh Barty remains top and French Open winner Barbora Krejcikova climbed to a career-high of fifth.
Danish teenager Clara Tauson rose 18 places to 52nd after capturing her second title of the year in Luxembourg.
Italy’s Jasmine Paolini jumped from 87th to 64th following her first WTA title at Portoroz, Slovenia.
WTA rankings as of September 20:
- Ashleigh Barty (AUS) 10075 pts
- Aryna Sabalenka (BLR) 7720
- Karolina Pliskova (CZE) 5315
- Elina Svitolina (UKR) 4860
- Barbora Krejcikova (CZE) 4668 (+2)
- Iga Swiatek (POL) 4571 (+2)
- Sofia Kenin (USA) 4413 (-1)
- Naomi Osaka (JPN) 4326 (-3)
- Garbine Muguruza (ESP) 4135
- Petra Kvitova (CZE) 4060
- Belinda Bencic (SUI) 3820 (+1)
- Maria Sakkari (GRE) 3750 (+1)
- Anastasia Pavlyuchenkova (RUS) 3285 (+1)
- Simona Halep (ROM) 3152 (-3)
- Angelique Kerber (GER) 3115
- Elena Rybakina (KAZ) 3068 (+1)
- OnsJabeur (TUN) 2975 (+1)
- Elise Mertens (BEL) 2890 (-2)
- Coco Gauff (USA) 2815
- Bianca Andreescu (CAN) 2777
- Clara Tauson (DEN) 1300 (+18)
- Jasmine Paolini (ITA) 1075 (+23)