2017 Bauer Watertechnology Cup – Singles

Steve Darcis was the defending champion but chose not to defend his title.

Maximilian Marterer won the title after defeating Jerzy Janowicz 7–6(10–8), 3–6, 6–3 in the final.

Seeds
• # 🇧🇪 Ruben Bemelmans (quarterfinals)

• # 🇩🇪 Maximilian Marterer (champion)

• # 🇰🇿 Alexander Bublik (second round)

• # 🇩🇪 Yannick Hanfmann (first round)

• # 🇩🇪 Dustin Brown (second round)

• # 🇸🇰 Lukáš Lacko (first round)

• # 🇵🇱 Jerzy Janowicz (final)

• # 🇦🇹 Sebastian Ofner (semifinals)