2018 IsarOpen – Singles

This was the first edition of the tournament.

Pedro Sousa won the title after defeating Jan-Lennard Struff 6–1, 6–3 in the final.

Seeds
• # 🇩🇪 Jan-Lennard Struff (final)

• # 🇨🇿 Jiří Veselý (quarterfinals, retired)

• # 🇪🇪 Jürgen Zopp (second round)

• # 🇮🇹 Paolo Lorenzi (first round)

• # 🇸🇰 Martin Kližan (semifinals)

• # 🇩🇪 Yannick Hanfmann (withdrew)

• # 🇳🇴 Casper Ruud (first round)

• # 🇮🇹 Simone Bolelli (first round)