2023 Champaign–Urbana Challenger

The 2023 Champaign–Urbana Challenger was a professional tennis tournament played on hard courts. It was the 27th edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Champaign, Illinois, United States between November 13 and November 19, 2023.

Seeds

 * 1 Rankings are as of November 6, 2023.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇯🇵 Kenta Miyoshi
 * Kārlis Ozoliņš
 * 🇺🇸 Ethan Quinn

The following players received entry into the singles main draw as alternates:
 * Evgeny Karlovskiy
 * 🇺🇸 Stefan Kozlov
 * 🇩🇪 Mats Rosenkranz

The following players received entry from the qualifying draw:
 * 🇺🇸 Hunter Heck
 * 🇪🇸 Iñaki Montes de la Torre
 * 🇺🇸 Alfredo Perez
 * 🇺🇸 Alex Rybakov
 * 🇬🇧 Mark Whitehouse
 * 🇺🇸 Cooper Williams

Singles

 * 🇺🇸 Patrick Kypson def. 🇺🇸 Alex Michelsen 6–4, 6–3.

Doubles

 * 🇦🇺 John-Patrick Smith / Sem Verbeek def. 🇺🇸 Lucas Horve / 🇬🇧 Oliver Okonkwo 6–2, 7–6(7–4).