2018 Bangkok Challenger II – Singles

Janko Tipsarević was the defending champion but chose not to defend his title.

Marcel Granollers won the title after defeating Enrique López Pérez 4–6, 6–2, 6–0 in the final.

Seeds
• # 🇪🇸 Marcel Granollers (champion)

• # 🇪🇸 Enrique López Pérez (final)

• # 🇪🇸 Pedro Martínez (quarterfinals)

• # Yang Tsung-hua (first round)

• # 🇷🇺 Ivan Nedelko (first round)

• # 🇩🇪 Mats Moraing (semifinals)

• # 🇯🇵 Yusuke Takahashi (quarterfinals)

• # 🇮🇹 Matteo Viola (quarterfinals)