1) Angelique Kerber
2) Caroline Wozniacki
3) Sloane Stephens
4) Karolina Pliskova
Explanation:
On September 15, 2019, World no.2 Czech tennis player Karolina Pliskova won her career 15th WTA (Women’s Tennis Association) title by defeating Croatia’s Petra Martic at the 6th edition of the 2019 Zhengzhou Open at Zhongyuan Tennis training base management Center, China. The prize money of the event that was held from September 9-15 was $1,000,000.