# 2023 Florianópolis Challenger – Singles

Igor Marcondes was the defending champion but chose not to defend his title.
Tomás Barrios Vera won the title after defeating Alejandro Tabilo 6–4, 6–4 in the final.

## Seeds

* Tomás Barrios Vera (champion)
* Alejandro Tabilo (final)
* Luciano Darderi (first round)
* Andrea Collarini (second round)
* Genaro Alberto Olivieri (quarterfinals)
* Thiago Seyboth Wild (second round)
* Alessandro Giannessi (quarterfinals)
* Francisco Comesaña (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 |
| 1 | Tomás Barrios Vera | 6 | 6 | | | | | |
| | Eduardo Ribeiro | 3 | 4 | | | | | |
| | Eduardo Ribeiro | 3 | 4 | | 1 | Tomás Barrios Vera | 6 | 6 |
| | | | | | 2 | Alejandro Tabilo | 4 | 4 |
| | Benjamin Hassan | 4 | 6 | 3 | 2 | Alejandro Tabilo | 4 | 4 |
| 2 | Alejandro Tabilo | 6 | 4 | 6 | | | | |

### 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 | T Barrios Vera | 6 | 6 | | | | | | | | | | | | | | | |
| | G Heide | 4 | 4 | | 1 | T Barrios Vera | 3 | 6 | 6 | | | | | | | | | |
| | G Villanueva | 3 | 7$^7$ | 2 | Q | GI Justo | 6 | 3 | 3 | | | | | | | | | |
| Q | Guido Iván Justo | 6 | 6$^2$ | 6 | | | | | | 1 | T Barrios Vera | 6 | 7$^7$ | | | | | |
| Q | O Luz | 6 | 6 | | | | | | | 5 | GA Olivieri | 3 | 6$^4$ | | | | | |
| Q | I Carou | 3 | 3 | | Q | O Luz | 7$^{10}$ | 4 | 2 | | | | | | | | | |
| | G Mpetshi Perricard | 5 | 5 | | 5 | GA Olivieri | 6$^8$ | 6 | 6 | | | | | | | | | |
| 5 | GA Olivieri | 7 | 7 | | | | | | | | | | | | 1 | T Barrios Vera | 6 | 6 |
| 4 | A Collarini | 6 | 6 | | | | | | | | | | | | | E Ribeiro | 3 | 4 |
| | RA Burruchaga | 2 | 1 | | 4 | A Collarini | 7$^7$ | 6$^2$ | 4 | | | | | | | | | |
| | E Ribeiro | 6 | 5 | 6 | | E Ribeiro | 6$^3$ | 7$^7$ | 6 | | | | | | | | | |
| | V Aboian | 4 | 7 | 3 | | | | | | | E Ribeiro | 6 | 6$^5$ | 7 | | | | |
| | G Lama | 3 | 3 | | | | | | | WC | J Fonseca | 1 | 7$^7$ | 5 | | | | |
| WC | J Fonseca | 6 | 6 | | WC | J Fonseca | 3 | 6 | 6 | | | | | | | | | |
| | D Dutra da Silva | 3 | 5 | | 6 | T Seyboth Wild | 6 | 3 | 4 | | | | | | | | | |
| 6 | T Seyboth Wild | 6 | 7 | | | | | | | | | | | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | A Giannessi | 6 | 6 | | | | | | | | | | | | | | | | |
| | Juan Bautista Otegui | 2 | 3 | | 7 | A Giannessi | 6 | 6 | | | | | | | | | | | |
| | P Boscardin Dias | 6 | 6 | | | P Boscardin Dias | 4 | 4 | | | | | | | | | | | |
| | M Janvier | 4 | 2 | | | | | | | 7 | A Giannessi | 6 | 4 | 6$^8$ | | | | | |
| Q | P Sakamoto | 6 | 6 | | | | | | | | B Hassan | 3 | 6 | 7$^{10}$ | | | | | |
| WC | Gustavo Ribeiro de Almeida | 0 | 4 | | Q | P Sakamoto | 6 | 3 | 2 | | | | | | | | | | |
| | B Hassan | 5 | 6 | 6 | | B Hassan | 4 | 6 | 6 | | | | | | | | | | |
| 3 | L Darderi | 7 | 4 | 4 | | | | | | | | | | | | B Hassan | 4 | 6 | 3 |
| 8 | F Comesaña | 6 | 6 | | | | | | | | | | | | 2 | A Tabilo | 6 | 4 | 6 |
| Q | A Huertas del Pino | 4 | 0 | | 8 | F Comesaña | 7$^7$ | 6 | | | | | | | | | | | |
| Q | Wilson Leite | 3 | 2 | | | J Pereira | 6$^5$ | 2 | | | | | | | | | | | |
| | J Pereira | 6 | 6 | | | | | | | 8 | F Comesaña | 6 | 3 | 5 | | | | | |
| WC | Pedro Rodrigues | 2 | 6$^4$ | | | | | | | 2 | A Tabilo | 4 | 6 | 7 | | | | | |
| | M Pucinelli de Almeida | 6 | 7$^7$ | | | M Pucinelli de Almeida | 4 | 6$^2$ | | | | | | | | | | | |
| | G Bueno | 1 | 0 | | 2 | A Tabilo | 6 | 7$^7$ | | | | | | | | | | | |
| 2 | A Tabilo | 6 | 6 | | | | | | | | | | | | | | | | |