# 2023 Aberto da República – Singles

Federico Coria was the defending champion but chose not to defend his title.
Alejandro Tabilo won the title after defeating Román Andrés Burruchaga 6–3, 7–6$^{(8–6)}$ in the final.

## Seeds

* Cristian Garín (quarterfinals)
* Tomás Barrios Vera (first round)
* Hugo Dellien (withdrew)
* Aleksandar Kovacevic (first round)
* Thiago Agustín Tirante (quarterfinals)
* Thiago Monteiro (withdrew)
* Nicolas Moreno de Alboran (second round)
* Guido Andreozzi (first round)
* Oliver Crawford (first round)

## 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 |
| | Santiago Rodríguez Taverna | 4 | 3 | | | | | |
| | Román Andrés Burruchaga | 6 | 6 | | | | | |
| | Román Andrés Burruchaga | 6 | 6 | | | Román Andrés Burruchaga | 3 | 6$^6$ |
| | | | | | Q | Alejandro Tabilo | 6 | 7$^8$ |
| Q | Alejandro Tabilo | 6 | 3 | 6 | Q | Alejandro Tabilo | 6 | 7$^8$ |
| | Juan Pablo Ficovich | 4 | 6 | 2 | | | | |

### 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 |
| 1 | C Garín | 6 | 6 | | | | | | | | | | | | | |
| Alt | O Luz | 0 | 4 | | 1 | C Garín | 7 | 6 | | | | | | | | |
| Q | G Bueno | 6$^2$ | 6$^7$ | | | JL Reis da Silva | 5 | 4 | | | | | | | | |
| | JL Reis da Silva | 7$^7$ | 7$^9$ | | | | | | | 1 | C Garín | 4 | 5 | | | |
| | S Rodríguez Taverna | 6 | 5 | 7 | | | | | | | S Rodríguez Taverna | 6 | 7 | | | |
| WC | E Ribeiro | 4 | 7 | 5 | | S Rodríguez Taverna | 3 | 6 | 7$^7$ | | | | | | | |
| | M Pucinelli de Almeida | 3 | 3 | | 7 | N Moreno de Alboran | 6 | 4 | 6$^5$ | | | | | | | |
| 7 | N Moreno de Alboran | 6 | 6 | | | | | | | | | | | S Rodríguez Taverna | 4 | 3 |
| 4 | A Kovacevic | 3 | 6 | 6$^2$ | | | | | | | | | | RA Burruchaga | 6 | 6 |
| WC | J Fonseca | 6 | 3 | 7$^7$ | WC | J Fonseca | 6 | 4 | 4 | | | | | | | |
| | H Casanova | 6 | 5 | 1 | | RA Burruchaga | 4 | 6 | 6 | | | | | | | |
| | RA Burruchaga | 1 | 7 | 6 | | | | | | | RA Burruchaga | 7$^7$ | 6 | | | |
| Alt | B Lock | 6$^4$ | 6$^5$ | | | | | | | | T Boyer | 6$^3$ | 1 | | | |
| | R Olivo | 7$^7$ | 7$^7$ | | | R Olivo | 1 | 4 | | | | | | | | |
| | T Boyer | 6 | 6 | | | T Boyer | 6 | 6 | | | | | | | | |
| 8 | G Andreozzi | 4 | 3 | | | | | | | | | | | | | |

### Bottom half

| 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 | Semifinals |
| LL | M Alves | 7 | 6 | | | | | | | | | | | | | | | |
| Q | F Romboli | 5 | 3 | LL | M Alves | 4 | 4 | | | | | | | | | | | |
| Q | A Tabilo | 6 | 7$^7$ | Q | A Tabilo | 6 | 6 | | | | | | | | | | | |
| Q | I Buse | 4 | 6$^5$ | | | | | | Q | A Tabilo | 6 | 6$^4$ | 7$^{11}$ | | | | | |
| | V Vacherot | 6 | 6 | | | | | | | B Tomic | 4 | 7$^7$ | 6$^9$ | | | | | |
| LL | B Bicknell | 1 | 1 | | V Vacherot | 5 | 7 | 6$^6$ | | | | | | | | | | |
| | B Tomic | 6 | 6 | | B Tomic | 7 | 5 | 7$^8$ | | | | | | | | | | |
| 9 | O Crawford | 3 | 2 | | | | | | | | | | | Q | A Tabilo | 6 | 3 | 6 |
| 5 | TA Tirante | 6 | 6 | | | | | | | | | | | | JP Ficovich | 4 | 6 | 2 |
| | F Bagnis | 2 | 4 | 5 | TA Tirante | 6 | 6 | | | | | | | | | | | |
| Q | Wilson Leite | 6$^4$ | 5 | WC | G Klier Júnior | 4 | 4 | | | | | | | | | | | |
| WC | Gilbert Klier Júnior | 7$^7$ | 7 | | | | | | 5 | TA Tirante | 6 | 3 | 6$^1$ | | | | | |
| | JP Ficovich | 6 | 6 | | | | | | | JP Ficovich | 4 | 6 | 7$^7$ | | | | | |
| Q | P Sakamoto | 1 | 2 | | JP Ficovich | 7$^7$ | 6 | | | | | | | | | | | |
| | G Heide | 7$^9$ | 6 | | G Heide | 6$^2$ | 3 | | | | | | | | | | | |
| 2 | T Barrios Vera | 6$^7$ | 4 | | | | | | | | | | | | | | | |