2018 OEC Kaohsiung – Singles

Evgeny Donskoy was the defending champion but chose not to defend his title.

Gaël Monfils won the title after defeating Kwon Soon-woo 6–4, 2–6, 6–1 in the final.

Seeds
• # 🇫🇷 Gaël Monfils (champion)

• # 🇹🇳 Malek Jaziri (semifinals)

• # 🇦🇺 Jason Kubler (first round)

• # Jason Jung (second round)

• # Lloyd Harris (second round)

• # 🇮🇳 Ramkumar Ramanathan (second round)

• # Ernests Gulbis (quarterfinals)

• # 🇮🇳 Prajnesh Gunneswaran (first round)