2017 Gimcheon Open ATP Challenger – Singles

Max Purcell was the defending champion but lost to Bradley Mousley in the second qualifying round.

Thomas Fabbiano won the title after defeating Teymuraz Gabashvili 7–5, 6–1 in the final.

Seeds
• # Lu Yen-hsun (second round)

• # 🇷🇺 Konstantin Kravchuk (semifinals)

• # 🇨🇦 Vasek Pospisil (quarterfinals)

• # 🇺🇦 Illya Marchenko (second round)

• # Blaž Kavčič (semifinals)

• # 🇧🇪 Ruben Bemelmans (second round)

• # 🇰🇷 Lee Duck-hee (second round)

• # 🇯🇵 Go Soeda (second round)