2013 Fifth Third Bank Tennis Championships – Men's singles

Denis Kudla was the defending champion, but chose not to compete. James Ward defeated James Duckworth in the final.

Seeds
• # 🇺🇦 Illya Marchenko (quarterfinals)

• # 🇧🇪 Olivier Rochus (first round)

• # 🇧🇪 Ruben Bemelmans (second round)

• # 🇺🇸 Alex Kuznetsov (first round)

• # 🇺🇸 Bradley Klahn (semifinals)

• # 🇦🇺 James Duckworth (final)

• # 🇯🇵 Tatsuma Ito (quarterfinals)

• # 🇹🇳 Malek Jaziri (quarterfinals)