# 2023 Challenger AAT – Singles

Francisco Comesaña was the defending champion but lost in the second round to Andrea Collarini.
Thiago Seyboth Wild won the title after defeating Luciano Darderi 6–3, 6–3 in the final.

## Seeds

* Andrea Collarini (semifinals)
* Thiago Agustín Tirante (withdrew)
* Luciano Darderi (final)
* Juan Pablo Ficovich (first round)
* Genaro Alberto Olivieri (withdrew)
* Nick Hardt (second round)
* Mariano Navone (semifinals)
* Thiago Seyboth Wild (champion)

## 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 |
| 1 | Andrea Collarini | 6 | 6$^5$ | 2 | | | | |
| 3 | Luciano Darderi | 4 | 7$^7$ | 6 | | | | |
| 3 | Luciano Darderi | 4 | 7$^7$ | 6 | 3 | Luciano Darderi | 3 | 3 |
| | | | | | 8 | Thiago Seyboth Wild | 6 | 6 |
| 8 | Thiago Seyboth Wild | 6 | 6 | | 8 | Thiago Seyboth Wild | 6 | 6 |
| 7 | Mariano Navone | 2 | 3 | | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | A Collarini | 6 | 6 | | | | | | | | | | | | | | | |
| | D Dutra da Silva | 4 | 2 | | 1 | A Collarini | 6 | 6 | | | | | | | | | | |
| | M Pucinelli de Almeida | 4 | 2 | | | F Comesaña | 3 | 4 | | | | | | | | | | |
| | F Comesaña | 6 | 6 | | | | | | | 1 | A Collarini | 6 | 6 | | | | | |
| Alt | G Lama | 6$^6$ | 6$^2$ | | | | | | | | G Villanueva | 2 | 1 | | | | | |
| | G Villanueva | 7$^8$ | 7$^7$ | | | G Villanueva | 7 | 1 | 7 | | | | | | | | | |
| WC | L Midón | 4 | 4 | | 6 | N Hardt | 5 | 6 | 5 | | | | | | | | | |
| 6 | N Hardt | 6 | 6 | | | | | | | | | | | 1 | A Collarini | 6 | 6$^5$ | 2 |
| 3 | L Darderi | 6 | 6 | | | | | | | | | | | 3 | L Darderi | 4 | 7$^7$ | 6 |
| | M Janvier | 3 | 4 | | 3 | L Darderi | 6 | 6 | | | | | | | | | | |
| Alt | Juan Bautista Otegui | 4 | 2 | | Q | C Huertas del Pino | 2 | 0 | | | | | | | | | | |
| Q | C Huertas del Pino | 6 | 6 | | | | | | | 3 | L Darderi | 6 | 6 | | | | | |
| | S Rodríguez Taverna | 6 | 6 | | | | | | | | S Rodríguez Taverna | 3 | 2 | | | | | |
| WC | Alex Barrena | 0 | 4 | | | S Rodríguez Taverna | 6 | 6 | | | | | | | | | | |
| Q | V Aboian | 3 | 6 | 3 | Q | V Aboian | 3 | 4 | | | | | | | | | | |
| LL | J Pereira | 6 | 1 | 0$^r$ | | | | | | | | | | | | | | |

### 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 |
| 8 | T Seyboth Wild | 6 | 4 | 6 | | | | | | | | | | | | | |
| | B Hassan | 2 | 6 | 3 | 8 | T Seyboth Wild | 6 | 3 | 6 | | | | | | | | |
| LL | Wilson Leite | 3 | 2 | | | M Dellien | 1 | 6 | 1 | | | | | | | | |
| | M Dellien | 6 | 6 | | | | | | | 8 | T Seyboth Wild | 6 | 6 | | | | |
| Alt | P Boscardin Dias | 1 | 3 | | | | | | | | H Casanova | 3 | 2 | | | | |
| | H Casanova | 6 | 6 | | | H Casanova | 6 | 6$^1$ | 6 | | | | | | | | |
| | JL Reis da Silva | 6 | 7 | | | JL Reis da Silva | 1 | 7$^7$ | 4 | | | | | | | | |
| 4 | JP Ficovich | 2 | 5 | | | | | | | | | | | 8 | T Seyboth Wild | 6 | 6 |
| 7 | M Navone | 6 | 6 | | | | | | | | | | | 7 | M Navone | 2 | 3 |
| WC | AL Lingua Lavallén | 3 | 2 | | 7 | M Navone | 7 | 0 | 7 | | | | | | | | |
| | JB Torres | 6 | 6 | | | JB Torres | 5 | 6 | 5 | | | | | | | | |
| Q | Matías Zukas | 2 | 1 | | | | | | | 7 | M Navone | 6 | 7$^7$ | | | | |
| Q | Tomás Farjat | 2 | 1 | | | | | | | | RA Burruchaga | 3 | 6$^2$ | | | | |
| | RA Burruchaga | 6 | 6 | | | RA Burruchaga | 6 | 6 | | | | | | | | | |
| Q | G Heide | 6 | 6 | | Q | G Heide | 1 | 2 | | | | | | | | | |
| Q | M Kestelboim | 4 | 3 | | | | | | | | | | | | | | |