Ashleigh Barty remains the world No 1 for another week, according to the latest WTA rankings released Monday, but the Australian faces a tough battle in Wuhan if she is to stay on top.
Barty heads into her first round match against Caroline Garcia at the Wuhan Open with a 321-point lead over Karolina Pliskova in the rankings.
The 27-year-old Pliskova is in form having won in Zhengzhou earlier this month, unlike Barty who has struggled since her outstanding start to the season when she won the French Open and in Birmingham.
Barty has held the No 1 spot since the beginning of September having also occupied it in July and August.
Pliskova of the Czech Republic has not reached No 1 since summer 2017.
There were no changes in the top 10.
WTA RANKINGS AS OF SEPTEMBER 23:
1. Ashleigh Barty (AUS) 6 446 pts
2. Karolína Plískova (CZE) 6 125
3. Elina Svitolina (UKR) 5 160
4. Naomi Osaka (JPN) 5 011
5. Bianca Andreescu (CAN) 4 835
6. Simona Halep (ROU) 4 803
7. Petra Kvitová (CZE) 4 326
8. Kiki Bertens (NED) 4 225
9. Serena Williams (USA) 3 935
10. Belinda Bencic (SUI) 3 738