2018 Sparkassen ATP Challenger – Singles

Lorenzo Sonego was the defending champion but lost in the first round to Constant Lestienne.

Ugo Humbert won the title after defeating Pierre-Hugues Herbert 6–4, 6–2 in the final.

Seeds
• # 🇫🇷 Pierre-Hugues Herbert (final)

• # 🇸🇰 Lukáš Lacko (first round)

• # 🇪🇸 Jaume Munar (first round)

• # 🇮🇹 Lorenzo Sonego (first round)

• # 🇱🇹 Ričardas Berankis (quarterfinals)

• # 🇫🇷 Ugo Humbert (champion)

• # 🇩🇪 Yannick Maden (withdrew)

• # 🇩🇪 Matthias Bachinger (first round)