2023 Champaign–Urbana Challenger – Singles

Ben Shelton was the defending champion but chose not to defend his title.

Patrick Kypson won the title after defeating Alex Michelsen 6–4, 6–3 in the final.

Seeds
• # 🇺🇸 Aleksandar Kovacevic (quarterfinals)

• # 🇺🇸 Alex Michelsen (final)

• # 🇺🇸 Emilio Nava (first round)

• # 🇫🇷 Titouan Droguet (semifinals)

• # 🇺🇸 Denis Kudla (first round, retired)

• # 🇰🇿 Beibit Zhukayev (second round)

• # 🇺🇸 Patrick Kypson (champion)

• # 🇺🇸 Martin Damm (quarterfinals)