2017 AON Open Challenger – Singles

Jerzy Janowicz was the defending champion but chose not to defend his title.

Stefanos Tsitsipas won the title after defeating Guillermo García López 7–5, 7–6(7–2) in the final.

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

• # 🇮🇹 Andreas Seppi (first round)

• # 🇮🇹 Alessandro Giannessi (second round)

• # 🇷🇸 Laslo Đere (second round)

• # 🇮🇹 Marco Cecchinato (first round)

• # 🇦🇷 Renzo Olivo (first round)

• # 🇩🇪 Dustin Brown (second round)

• # 🇭🇺 Márton Fucsovics (semifinals, retired)