2023 Swiss Open Gstaad – Singles

Pedro Cachin defeated Albert Ramos Viñolas in the final, 3–6, 6–0, 7–5 to win the singles tennis title at the 2023 Swiss Open Gstaad. It was his first ATP Tour singles title.

Casper Ruud was the two-time reigning champion, but chose to compete in Båstad instead.

Seeds
The top four seeds received a bye into the second round. • #🇪🇸 Roberto Bautista Agut (second round)

• #🇷🇸 Miomir Kecmanović (semifinals)

• #🇮🇹 Lorenzo Sonego (second round)

• #🇩🇪 Yannick Hanfmann (quarterfinals)

• #🇨🇳 Zhang Zhizhen (first round)

• #🇪🇸 Roberto Carballés Baena (first round, retired)

• #🇸🇪 Mikael Ymer (suspended for violating anti-doping rules)

• #🇷🇸 Laslo Djere (first round)

Seeds
• # 🇦🇹 Jurij Rodionov (qualified)

• # 🇦🇷 Facundo Bagnis (qualified)

• # 🇫🇮 Otto Virtanen (qualifying competition, lucky loser)

• # 🇧🇷 Thiago Seyboth Wild (first round)

• # 🇦🇷 Thiago Agustín Tirante (first round)

• # 🇮🇹 Raúl Brancaccio (first round)

• # Ivan Gakhov (first round)

• # 🇷🇸 Hamad Medjedovic (qualified)

Qualifiers
• # 🇦🇹 Jurij Rodionov

• # 🇦🇷 Facundo Bagnis

• # 🇷🇸 Hamad Medjedovic

• # 🇧🇪 Zizou Bergs

Lucky loser
• # 🇫🇮 Otto Virtanen