Frenchwoman Caroline Garcia returned to the top 20 in the WTA rankings on Monday after beating Petra Kvitova to win the Cincinnati title at the weekend.
The 28-year-old, who had slipped to 79th in the standings in May, is back in the top 20 for the first time since March 2019.
Garcia beat Kvitova 6-2, 6-4 in Sunday's final to win her first WTA 1000 title since 2017.
Iga Swiatek retained her commanding lead as world number one despite losing to Madison Keys in the Cincinnati last 16.