| Date: | 9 – 15 October |
| Edition: | 12th |
| Surface: | Clay |
| Location: | Buenos Aires, Argentina |
| Champs: |  Mariano Navone |
| Champd: |  Diego Hidalgo /  Cristian Rodríguez |
The 2023 Challenger de Buenos Aires was a professional tennis tournament played on clay courts. It was the 12th edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Buenos Aires, Argentina between 9 and 15 October 2023.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Argentina | Federico Coria | 83 | 1 | |
| Argentina | Juan Manuel Cerúndolo | 102 | 2 | |
| Argentina | Facundo Díaz Acosta | 106 | 3 | |
| Tomás Barrios Vera | 108 | 4 | ||
 Czech Republic | Vít Kopřiva | 114 | 5 | |
| Alejandro Tabilo | 120 | 6 | ||
| Argentina | Francisco Comesaña | 126 | 7 | |
 United Kingdom | Jan Choinski | 127 | 8 |
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw as a special exempt:
The following player received entry into the singles main draw as an alternate:
The following players received entry from the qualifying draw:
Murkel Dellien Renzo Olivo
João Lucas Reis da Silva Juan Bautista Torres Marco Trungelliti Gonzalo VillanuevaThe following player received entry as a lucky loser:
See main article: 2023 Challenger de Buenos Aires – Singles.
Mariano Navone def. Federico Coria 2–6, 6–3, 6–4.See main article: 2023 Challenger de Buenos Aires – Doubles.
Diego Hidalgo / Cristian Rodríguez def. Fernando Romboli / Marcelo Zormann 6–3, 6–2.