2017 Sibiu Open – Singles

Robin Haase was the defending champion but chose not to defend his title.

Cedrik-Marcel Stebe won the title after defeating Carlos Taberner 6–3, 6–3 in the final.

Seeds
• # 🇩🇪 Cedrik-Marcel Stebe (champion)

• # 🇷🇸 Laslo Đere (first round)

• # 🇮🇹 Marco Cecchinato (second round)

• # 🇪🇸 Roberto Carballés Baena (second round)

• # 🇩🇪 Maximilian Marterer (semifinals)

• # 🇺🇸 Bjorn Fratangelo (quarterfinals)

• # 🇮🇹 Stefano Travaglia (quarterfinals)

• # 🇯🇵 Taro Daniel (first round)