2023 Porsche Tennis Grand Prix – Singles

Defending champion Iga Świątek defeated Aryna Sabalenka in a rematch of the previous year's final, 6–3, 6–4 to win the singles tennis title at the 2023 Stuttgart Open. The final marked the first time the top two players in the world contested a WTA Tour final since the 2018 Australian Open, and the first such match overall since 2019 WTA Finals. This was also the first time since 2005 that the two defending Stuttgart finalists returned to contest the following year's final.