2019 Swiss Open Gstaad – Singles

Matteo Berrettini was the defending champion, but withdrew with an ankle injury before the tournament began.

Albert Ramos Viñolas won the title, defeating Cedrik-Marcel Stebe in the final, 6–3, 6–2.

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

• #🇪🇸 Fernando Verdasco (second round)

• #🇷🇸 Dušan Lajović (quarterfinals)

• #🇮🇹 Lorenzo Sonego (second round)

• # João Sousa (semifinals)

• #🇪🇸 Roberto Carballés Baena (quarterfinals)

• #🇪🇸 Pablo Andújar (semifinals)

• #🇫🇷 Corentin Moutet (first round)

Seeds
• # 🇯🇵 Taro Daniel (moved to main draw)

• # 🇦🇹 Dennis Novak (qualified)

• # 🇮🇹 Filippo Baldi (qualified)

• # 🇦🇷 Marco Trungelliti (qualifying competition)

• # 🇪🇸 Guillermo García López (qualifying competition)

• # 🇨🇴 Daniel Elahi Galán (qualified)

• # 🇮🇹 Stefano Napolitano (first round)

• # 🇦🇷 Facundo Argüello (withdrew)

Qualifiers
• # 🇨🇴 Daniel Elahi Galán

• # 🇦🇹 Dennis Novak

• # 🇮🇹 Filippo Baldi

• # 🇮🇹 Gian Marco Moroni