# 2023 Challenger Ciudad de Guayaquil – Singles

Daniel Altmaier was the defending champion but chose not to defend his title.
Alejandro Tabilo won the title after defeating Daniel Elahi Galán 6–2, 6–2 in the final.

## Seeds

* Federico Coria (quarterfinals)
* Daniel Elahi Galán (final)
* Facundo Díaz Acosta (quarterfinals, retired)
* Juan Manuel Cerúndolo (first round)
* Alejandro Tabilo (champion)
* Hugo Dellien (quarterfinals)
* Felipe Meligeni Alves (semifinals)
* Camilo Ugo Carabelli (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 | Final | Final | Final | Final |
| 5 | Alejandro Tabilo | 6 | 6 | | | | |
| | Román Andrés Burruchaga | 3 | 4 | | | | |
| | Román Andrés Burruchaga | 3 | 4 | 5 | Alejandro Tabilo | 6 | 6 |
| | | | | 2/WC | Daniel Elahi Galán | 2 | 2 |
| 7 | Felipe Meligeni Alves | 4 | 6$^5$ | 2/WC | Daniel Elahi Galán | 2 | 2 |
| 2/WC | Daniel Elahi Galán | 6 | 7$^7$ | | | | |

### 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 | 6 | 5 | 6 | | | | | | | | | | | | | | |
| Q | Gerard Campana Lee | 0 | 7 | 1 | 1 | F Coria | 4 | 6 | 6 | | | | | | | | | |
| | F Agamenone | 6 | 4 | 6 | | F Agamenone | 6 | 4 | 3 | | | | | | | | | |
| | O Crawford | 3 | 6 | 1 | | | | | | 1 | F Coria | 7$^7$ | 4 | 4 | | | | |
| WC | A Andrade | 3 | 4 | | | | | | | 5 | A Tabilo | 6$^4$ | 6 | 6 | | | | |
| | M Pucinelli de Almeida | 6 | 6 | | | M Pucinelli de Almeida | 6 | 1 | 2 | | | | | | | | | |
| Q | JB Torres | 4 | 1 | | 5 | A Tabilo | 4 | 6 | 6 | | | | | | | | | |
| 5 | A Tabilo | 6 | 6 | | | | | | | | | | | | 5 | A Tabilo | 6 | 6 |
| 4 | JM Cerúndolo | 4 | 2 | | | | | | | | | | | | | RA Burruchaga | 3 | 4 |
| | RA Burruchaga | 6 | 6 | | | RA Burruchaga | 5 | 6 | 6 | | | | | | | | | |
| WC | Á Guillén Meza | 4 | 6 | 4 | | L Neumayer | 7 | 0 | 4 | | | | | | | | | |
| | L Neumayer | 6 | 2 | 6 | | | | | | | RA Burruchaga | 6 | 5 | 6 | | | | |
| | L Darderi | 6 | 6 | | | | | | | 8 | C Ugo Carabelli | 4 | 7 | 1 | | | | |
| | D Svrčina | 2 | 3 | | | L Darderi | 6 | 6$^5$ | 2 | | | | | | | | | |
| | JL Reis da Silva | 4 | 0 | | 8 | C Ugo Carabelli | 4 | 7$^7$ | 6 | | | | | | | | | |
| 8 | C Ugo Carabelli | 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 |
| 7 | F Meligeni Alves | 4 | 6 | 6 | | | | | | | | | | | | | |
| Q | N Mejía | 6 | 2 | 4 | 7 | F Meligeni Alves | 5 | 6 | 6 | | | | | | | | |
| Q | M Houkes | 6 | 6 | | Q | M Houkes | 7 | 3 | 4 | | | | | | | | |
| Q | C Taberner | 3 | 1 | | | | | | | 7 | F Meligeni Alves | 6 | 3 | | | | |
| Q | G Bueno | 0 | 4 | | | | | | | 3 | F Díaz Acosta | 1 | 1$^r$ | | | | |
| | M Trungelliti | 6 | 6 | | | M Trungelliti | 1 | 6 | 6$^5$ | | | | | | | | |
| | M Dellien | 3 | 2 | | 3 | F Díaz Acosta | 6 | 1 | 7$^7$ | | | | | | | | |
| 3 | F Díaz Acosta | 6 | 6 | | | | | | | | | | | 7 | F Meligeni Alves | 4 | 6$^5$ |
| 6 | H Dellien | 6 | 7 | | | | | | | | | | | 2/WC | DE Galán | 6 | 7$^7$ |
| LL | Alex Barrena | 2 | 5 | | 6 | H Dellien | 6 | 4 | 6 | | | | | | | | |
| | S Rodríguez Taverna | 6 | 6 | | | S Rodríguez Taverna | 2 | 6 | 3 | | | | | | | | |
| | T Boyer | 1 | 4 | | | | | | | 6 | H Dellien | 1 | 2 | | | | |
| | R Pacheco Méndez | 1 | 6 | 6$^5$ | | | | | | 2/WC | DE Galán | 6 | 6 | | | | |
| | E Ymer | 6 | 2 | 7$^7$ | | E Ymer | 3 | 2 | | | | | | | | | |
| | K Feldbausch | 3 | 7$^7$ | 0$^r$ | 2/WC | DE Galán | 6 | 6 | | | | | | | | | |
| 2/WC | DE Galán | 6 | 6$^4$ | 5 | | | | | | | | | | | | | |