2017 Sparkassen ATP Challenger – Singles

Stefano Napolitano was the defending champion but lost in the second round to Matteo Donati.

Lorenzo Sonego won the title after defeating Tim Pütz 6–4, 6–4 in the final.

Seeds
• # 🇷🇴 Marius Copil (withdrew)

• # 🇸🇰 Norbert Gombos (first round)

• # 🇮🇹 Andreas Seppi (quarterfinals)

• # 🇫🇷 Pierre-Hugues Herbert (semifinals)

• # 🇭🇺 Márton Fucsovics (first round)

• # 🇩🇪 Dustin Brown (second round)

• # 🇩🇪 Oscar Otte (quarterfinals)

• # 🇦🇹 Sebastian Ofner (second round)