2018 Bangkok Challenger – Singles

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

Marcel Granollers won the title after defeating Mats Moraing 4–6, 6–3, 7–5 in the final.

Seeds
• # 🇩🇪 Yannick Maden (second round, withdrew)

• # 🇯🇵 Go Soeda (first round)

• # 🇯🇵 Tatsuma Ito (first round)

• # 🇷🇸 Nikola Milojević (first round, retired)

• # 🇪🇪 Jürgen Zopp (first round)

• # 🇪🇸 Marcel Granollers (champion)

• # 🇨🇳 Zhang Ze (quarterfinals, withdrew)

• # Gonçalo Oliveira (second round)