2013 JSM Challenger of Champaign–Urbana – Singles

Tim Smyczek was the defending champion but lost to Erik Crepaldi in the first round. Unseeded American Tennys Sandgren won the title defeating Australian 7th seed Samuel Groth 3–6, 6–3, 7–6(7–5).

Seeds
• # 🇺🇸 Tim Smyczek (first round)

• # 🇺🇸 Jack Sock (second round)

• # 🇺🇸 Rajeev Ram (second round)

• # 🇺🇸 Alex Kuznetsov (first round)

• # 🇨🇦 Peter Polansky (first round)

• # Rik de Voest (first round)

• # 🇦🇺 Samuel Groth (final)

• # 🇦🇺 John-Patrick Smith (quarterfinal)