2018 Bauer Watertechnology Cup – Singles

Maximilian Marterer was the defending champion but chose not to defend his title.

Antoine Hoang won the title after defeating Ruben Bemelmans 7–5, 6–3 in the final.

Seeds
• # 🇸🇰 Lukáš Lacko (first round)

• # 🇵🇱 Hubert Hurkacz (second round, retired)

• # 🇪🇸 Guillermo García López (second round)

• # 🇷🇺 Evgeny Donskoy (semifinals)

• # 🇩🇪 Yannick Maden (first round)

• # 🇨🇾 Marcos Baghdatis (first round)

• # 🇧🇪 Ruben Bemelmans (final)

• # 🇦🇹 Dennis Novak (second round)