2009 Busan Open Challenger Tennis – Singles

Go Soeda was the defending champion but lost to his compatriot Yuichi Sugita in the first round. Danai Udomchoke became the new champion after his win against Blaž Kavčič in the final (6–2, 6–2).

Seeds
• # 🇯🇵 Go Soeda (first round)

• # 🇹🇭 Danai Udomchoke (champion)

• # 🇩🇪 Florian Mayer (semifinals)

• # 🇰🇷 Im Kyu-tae (semifinals)

• # Kristian Pless (first round)

• # Marco Chiudinelli (second round)

• # 🇦🇺 Samuel Groth (quarterfinals)

• # Blaž Kavčič (final)