See main article: 2023 Swiss Indoors.
Defending champion Félix Auger-Aliassime[1] defeated Hubert Hurkacz in the final, 7–6(7–3), 7–6(7–5) to win the singles tennis title at the 2023 Swiss Indoors. He saved a match point en route to his fifth career ATP Tour title (and his first in a year), in the quarterfinals against Alexander Shevchenko.