# 2023 Challenger de Santiago – Singles

Hugo Dellien was the defending champion and successfully defended his title after defeating Thiago Seyboth Wild 3–6, 6–3, 6–3 in the final.

## Seeds

* Nicolás Jarry (withdrew)
* Marco Cecchinato (first round)
* Facundo Bagnis (quarterfinals)
* Hugo Dellien (champion)
* Juan Manuel Cerúndolo (first round)
* Camilo Ugo Carabelli (second round)
* Franco Agamenone (quarterfinals)
* Facundo Díaz Acosta (semifinals)

## 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 | Final | Final | Final | Final | Final |
| 8 | Facundo Díaz Acosta | 6$^2$ | 3 | | | | | |
| Q | Thiago Seyboth Wild | 7$^7$ | 6 | | | | | |
| Q | Thiago Seyboth Wild | 7$^7$ | 6 | Q | Thiago Seyboth Wild | 6 | 3 | 3 |
| | | | | 4 | Hugo Dellien | 3 | 6 | 6 |
| 4 | Hugo Dellien | 6 | 6 | 4 | Hugo Dellien | 3 | 6 | 6 |
| | Genaro Alberto Olivieri | 2 | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| Q | D Dutra da Silva | 6 | 6$^4$ | 2$^r$ | | | | | | | | | | | | | | |
| LL | JL Reis da Silva | 4 | 7$^7$ | 4 | LL | JL Reis da Silva | 6 | 3 | 5 | | | | | | | | | |
| | L Darderi | 7$^7$ | 7$^7$ | | | L Darderi | 4 | 6 | 7 | | | | | | | | | |
| WC | G Lama | 6$^5$ | 6$^1$ | | | | | | | | L Darderi | 0 | 5 | | | | | |
| | F Delbonis | 4 | 6 | 3 | | | | | | 8 | F Díaz Acosta | 6 | 7 | | | | | |
| Q | H Gaston | 6 | 4 | 6 | Q | H Gaston | 5 | 3 | | | | | | | | | | |
| | N Kicker | 3 | 3 | | 8 | F Díaz Acosta | 7 | 6 | | | | | | | | | | |
| 8 | F Díaz Acosta | 6 | 6 | | | | | | | | | | | | 8 | F Díaz Acosta | 6$^2$ | 3 |
| 3 | F Bagnis | 6 | 6 | | | | | | | | | | | | Q | T Seyboth Wild | 7$^7$ | 6 |
| | B Kuzuhara | 0 | 1 | | 3 | F Bagnis | 6 | 6 | | | | | | | | | | |
| LL | G Villanueva | 0 | 1 | | | H Casanova | 2 | 3 | | | | | | | | | | |
| | H Casanova | 6 | 6 | | | | | | | 3 | F Bagnis | 6 | 1 | 0 | | | | |
| | T Barrios Vera | 5 | 6 | 1 | | | | | | Q | T Seyboth Wild | 3 | 6 | 6 | | | | |
| | G Bueno | 7 | 2 | 6 | | G Bueno | 2 | 6$^5$ | | | | | | | | | | |
| Q | T Seyboth Wild | 6 | 6 | | Q | T Seyboth Wild | 6 | 7$^7$ | | | | | | | | | | |
| 5 | JM Cerúndolo | 3 | 4 | | | | | | | | | | | | | | | |

### 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 |
| 7 | F Agamenone | 6 | 6$^5$ | 6 | | | | | | | | | | | | | | |
| Q | JB Torres | 3 | 7$^7$ | 3 | 7 | F Agamenone | 3 | 6 | 6 | | | | | | | | | |
| | M Navone | 0 | 4 | | | RA Burruchaga | 6 | 2 | 4 | | | | | | | | | |
| | RA Burruchaga | 6 | 6 | | | | | | | 7 | F Agamenone | 7$^7$ | 6$^3$ | 6$^5$ | | | | |
| | A Vavassori | 6 | 6 | | | | | | | 4 | H Dellien | 6$^5$ | 7$^7$ | 7$^7$ | | | | |
| | TA Tirante | 4 | 4 | | | A Vavassori | 5 | 6 | 6$^2$ | | | | | | | | | |
| | A Pellegrino | 3 | 6 | 2 | 4 | H Dellien | 7 | 4 | 7$^7$ | | | | | | | | | |
| 4 | H Dellien | 6 | 4 | 6 | | | | | | | | | | | 4 | H Dellien | 6 | 6 |
| 6 | C Ugo Carabelli | 6 | 6 | | | | | | | | | | | | | GA Olivieri | 2 | 2 |
| WC | Nicolás Villalón | 1 | 0 | | 6 | C Ugo Carabelli | 4 | 7 | 4 | | | | | | | | | |
| Q | F Gaio | 6$^5$ | 6 | 6 | Q | F Gaio | 6 | 5 | 6 | | | | | | | | | |
| | R Olivo | 7$^7$ | 4 | 1 | | | | | | Q | F Gaio | 3 | 3 | | | | | |
| | GA Olivieri | 7$^8$ | 6 | | | | | | | | GA Olivieri | 6 | 6 | | | | | |
| Q | Á López San Martín | 6$^6$ | 4 | | | GA Olivieri | 7$^8$ | 6 | | | | | | | | | | |
| | R Bonadio | 7$^7$ | 6 | | | R Bonadio | 6$^6$ | 2 | | | | | | | | | | |
| 2 | M Cecchinato | 6$^4$ | 2 | | | | | | | | | | | | | | | |