Ashleigh Barty defeated Aryna Sabalenka in the final, 3–6, 6–0, 6–3 to win the women's singles tennis title at the 2021 Stuttgart Open. It marked her 11th career Women's Tennis Association (WTA) singles title and her second on clay. She became the first reigning world No. 1 to win the title since Justine Henin in 2007.[1]
Bold denotes the mandatory tournaments (WTA 1000) † – Tournaments are affected by the COVID-19 pandemic * – Tournaments are introduced due to the impact of the COVID-19 pandemic