2018 Swiss Open Gstaad – Singles

Fabio Fognini was the defending champion, but lost in the second round to Jürgen Zopp.

Matteo Berrettini won his first ATP World Tour title, defeating Roberto Bautista Agut in the final, 7–6(11–9), 6–4.

Seeds
The top four seeds receive a bye into the second round. • #🇮🇹 Fabio Fognini (second round)

• #🇪🇸 Roberto Bautista Agut (final)

• # Borna Ćorić (second round)

• #🇷🇺 Andrey Rublev (second round)

• # Robin Haase (first round)

• # João Sousa (first round)

• #🇪🇸 Guillermo García López (first round)

• #🇪🇸 Feliciano López (quarterfinals)

Seeds
• # 🇩🇪 Yannick Hanfmann (qualified)

• # 🇪🇪 Jürgen Zopp (qualified)

• # Ernests Gulbis (withdrew)

• # 🇪🇸 Adrián Menéndez Maceiras (qualified)

• # 🇦🇷 Facundo Bagnis (qualified)

• # 🇮🇹 Matteo Donati (first round)

• # 🇫🇷 Kenny de Schepper (first round)

• # Viktor Galović (qualifying competition, lucky loser)

Qualifiers
• # 🇩🇪 Yannick Hanfmann

• # 🇪🇪 Jürgen Zopp

• # 🇦🇷 Facundo Bagnis

• # 🇪🇸 Adrián Menéndez Maceiras

Lucky losers
• # Viktor Galović

• # 🇪🇸 Oriol Roca Batalla