2023 Swiss Indoors – Singles

Defending champion Félix Auger-Aliassime 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.

Seeds
• # Holger Rune (semifinals)

• #🇳🇴 Casper Ruud (second round)

• #🇺🇸 Taylor Fritz (second round)

• #🇵🇱 Hubert Hurkacz (final)

• #🇦🇺 Alex de Minaur (second round)

• #🇨🇦 Félix Auger-Aliassime (champion)

• # Nicolás Jarry (second round)

• #🇺🇸 Sebastian Korda (first round)

Seeds
• # 🇦🇺 Christopher O'Connell (qualified)

• # 🇦🇺 Jordan Thompson (withdrew)

• # Botic van de Zandschulp (qualified)

• # 🇦🇷 Pedro Cachin (first round)

• # 🇧🇷 Thiago Seyboth Wild (qualifying competition, lucky loser)

• # 🇩🇪 Dominik Koepfer (qualifying competition)

• # 🇫🇷 Arthur Rinderknech (qualifying competition)

• # Alexander Shevchenko (qualified)

Qualifiers
• # 🇦🇺 Christopher O'Connell

• # 🇱🇧 Benjamin Hassan

• # Botic van de Zandschulp

• # Alexander Shevchenko

Lucky loser
• # 🇧🇷 Thiago Seyboth Wild