2023 Busan Open – Singles

Kamil Majchrzak was the defending champion but chose not to defend his title.

Aleksandar Vukic won the title after Max Purcell retired trailing 4–6, 0–1 in the final.

Seeds
• # 🇦🇺 Max Purcell (final, retired)

• # 🇺🇸 Christopher Eubanks (quarterfinals)

• # 🇦🇺 Jordan Thompson (quarterfinals)

• # 🇪🇨 Emilio Gómez (first round)

• # 🇦🇺 Rinky Hijikata (second round)

• # 🇦🇺 Aleksandar Vukic (champion)

• # 🇯🇵 Kaichi Uchida (first round)

• # 🇨🇦 Gabriel Diallo (semifinals)