- Source: 2023 AON Open Challenger
The 2023 AON Open Challenger was a professional tennis tournament played on clay courts. It was the 19th edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Genoa, Italy between 4 and 10 September 2023.
Singles main-draw entrants
= Seeds
=1 Rankings are as of 28 August 2023.
= Other entrants
=The following players received wildcards into the singles main draw:
Enrico Dalla Valle
Giovanni Fonio
Marcello Serafini
The following players received entry from the qualifying draw:
Hady Habib
Federico Iannaccone
Giovanni Oradini
Andrea Picchione
Lorenzo Rottoli
Tseng Chun-hsin
The following player received entry as a lucky loser:
Miljan Zekić
Champions
= Singles
=Thiago Seyboth Wild def. Fabio Fognini 6–2, 7–6(7–3).
= Doubles
=Giovanni Oradini / Lorenzo Rottoli def. Ivan Sabanov / Matej Sabanov 6–4, 6–3.