2018 Gwangju Open – Singles

Matthias Bachinger was the defending champion but chose not to defend his title.

Maverick Banes won the title after defeating Nam Ji-sung 6–3, 4–6, 6–4 in the final.

Seeds
• # 🇪🇸 Marcel Granollers (first round)

• # Henri Laaksonen (first round)

• # 🇰🇿 Alexander Bublik (semifinals)

• # 🇰🇷 Lee Duck-hee (quarterfinals)

• # 🇦🇺 Akira Santillan (quarterfinals)

• # 🇦🇺 Maverick Banes (champion)

• # 🇺🇸 Ulises Blanch (first round, retired)

• # 🇯🇵 Renta Tokuda (quarterfinals, retired)