# 2023 Challenger de Buenos Aires – Singles

Juan Manuel Cerúndolo was the defending champion but lost in the quarterfinals to Luciano Darderi.
Mariano Navone won the title after defeating Federico Coria 2–6, 6–3, 6–4 in the final.

## Seeds

* Federico Coria (final)
* Juan Manuel Cerúndolo (quarterfinals)
* Facundo Díaz Acosta (semifinals)
* Tomás Barrios Vera (first round)
* Vít Kopřiva (second round)
* Alejandro Tabilo (first round)
* Francisco Comesaña (quarterfinals)
* Jan Choinski (quarterfinals)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Federico Coria | 6 | 6 | | | | | | |
| 3 | Facundo Díaz Acosta | 4 | 4 | | | | | | |
| 3 | Facundo Díaz Acosta | 4 | 4 | | 1 | Federico Coria | 6 | 3 | 4 |
| | | | | | | Mariano Navone | 2 | 6 | 6 |
| | Mariano Navone | 2 | 6 | 7 | | Mariano Navone | 2 | 6 | 6 |
| | Luciano Darderi | 6 | 4 | 5 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | F Coria | 7$^7$ | 2 | 6 | | | | | | | | | | | | | | |
| WC | JP Ficovich | 6$^4$ | 6 | 3 | 1 | F Coria | 6 | 6 | | | | | | | | | | |
| | F Bagnis | 7$^7$ | 5 | 6$^2$ | Q | JL Reis da Silva | 1 | 3 | | | | | | | | | | |
| Q | JL Reis da Silva | 6$^5$ | 7 | 7$^7$ | | | | | | 1 | F Coria | 5 | 7$^7$ | 6 | | | | |
| | GA Olivieri | 7 | 4 | 6$^5$ | | | | | | 8 | J Choinski | 7 | 6$^3$ | 3 | | | | |
| | H Dellien | 5 | 6 | 7$^7$ | | H Dellien | 4 | 0$^r$ | | | | | | | | | | |
| | T Monteiro | 3 | 6 | 3 | 8 | J Choinski | 6 | 0 | | | | | | | | | | |
| 8 | J Choinski | 6 | 1 | 6 | | | | | | | | | | | 1 | F Coria | 6 | 6 |
| 3 | F Díaz Acosta | 6 | 6 | | | | | | | | | | | | 3 | F Díaz Acosta | 4 | 4 |
| WC | F Delbonis | 3 | 4 | | 3 | F Díaz Acosta | 6 | 6 | | | | | | | | | | |
| WC | RA Burruchaga | 0 | 4 | | Q | R Olivo | 3 | 4 | | | | | | | | | | |
| Q | R Olivo | 6 | 6 | | | | | | | 3 | F Díaz Acosta | 7$^7$ | 4 | 7$^7$ | | | | |
| | L Neumayer | 7$^7$ | 4 | 2 | | | | | | 7 | F Comesaña | 6$^5$ | 6 | 6$^3$ | | | | |
| | J Kovalík | 6$^5$ | 6 | 6 | | J Kovalík | 7$^7$ | 3 | 4 | | | | | | | | | |
| Q | M Trungelliti | 4 | 3 | | 7 | F Comesaña | 6$^3$ | 6 | 6 | | | | | | | | | |
| 7 | F Comesaña | 6 | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | A Tabilo | 4 | 6 | 5 | | | | | | | | | | | | | |
| | F Agamenone | 6 | 3 | 7 | | F Agamenone | 7$^7$ | 6 | | | | | | | | | |
| Q | G Villanueva | 2 | 6 | 6 | Q | G Villanueva | 6$^2$ | 2 | | | | | | | | | |
| Q | JB Torres | 6 | 2 | 3 | | | | | | | F Agamenone | 3 | 2 | | | | |
| Q | M Dellien | 2 | 2 | | | | | | | | M Navone | 6 | 6 | | | | |
| | M Navone | 6 | 6 | | | M Navone | 3 | 6 | 7$^7$ | | | | | | | | |
| LL | G Elias | 4 | 6 | 7 | LL | G Elias | 6 | 4 | 6$^3$ | | | | | | | | |
| 4 | T Barrios Vera | 6 | 2 | 5 | | | | | | | | | | M Navone | 2 | 6 | 7 |
| 5 | V Kopřiva | 7 | 7$^7$ | | | | | | | | | | | L Darderi | 6 | 4 | 5 |
| | D Svrčina | 5 | 6$^3$ | | 5 | V Kopřiva | 3 | 6 | 4 | | | | | | | | |
| | F Meligeni Alves | 6 | 2 | 4 | | L Darderi | 6 | 4 | 6 | | | | | | | | |
| | L Darderi | 4 | 6 | 6 | | | | | | | L Darderi | 6 | 7 | | | | |
| SE | A Pellegrino | 7 | 6 | | | | | | | 2 | JM Cerúndolo | 3 | 5 | | | | |
| Alt | G Andreozzi | 5 | 2 | | SE | A Pellegrino | 2 | 6 | 4 | | | | | | | | |
| | A Collarini | 3 | 3 | | 2 | JM Cerúndolo | 6 | 4 | 6 | | | | | | | | |
| 2 | JM Cerúndolo | 6 | 6 | | | | | | | | | | | | | | |