2013 Hall of Fame Tennis Championships – Singles

John Isner was the two-time defending champion, but was defeated by 2012 finalist Lleyton Hewitt in the semifinals. Nicolas Mahut defeated Hewitt in the final 5–7, 7–5, 6–3.

Seeds
• # 🇺🇸 Sam Querrey (first round)

• # 🇺🇸 John Isner (semifinals)

• # Igor Sijsling (quarterfinals)

• # 🇦🇺 Lleyton Hewitt (final)

• # 🇫🇷 Édouard Roger-Vasselin (first round)

• # 🇦🇺 Marinko Matosevic (first round, retired because of fatigue)

• # 🇫🇷 Kenny de Schepper (first round)

• # 🇺🇸 Rajeev Ram (second round)

Seeds
All seeds received a bye into the second round. • # 🇧🇪 Ruben Bemelmans (second round, retired)

• # 🇩🇪 Mischa Zverev (second round)

• # Jimmy Wang (second round)

• # 🇺🇸 Alex Kuznetsov (qualified)

• # 🇨🇿 Jan Hernych (qualified)

• # 🇺🇿 Farrukh Dustov (qualifying competition)

• # 🇦🇺 John-Patrick Smith (qualifying competition)

• # 🇺🇦 Denys Molchanov (second round)

Qualifiers
• # Ante Pavić

• # Adrien Bossel

• # 🇨🇿 Jan Hernych

• # 🇺🇸 Alex Kuznetsov