# 2021 Challenger Concepción – Singles

This was the first edition of the tournament.
Sebastián Báez won the title after defeating Francisco Cerúndolo 6–3, 6–7$^{(5–7)}$, 7–6$^{(7–5)}$ in the final.

## Seeds

* Federico Coria (quarterfinals)
* Andrej Martin (semifinals)
* Pedro Sousa (withdrew)
* Hugo Dellien (quarterfinals)
* Daniel Elahi Galán (second round)
* Thiago Seyboth Wild (quarterfinals)
* Facundo Bagnis (first round)
* Daniel Altmaier (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 |
| | Alejandro Tabilo | 1 | 1 | | | | |
| | Francisco Cerúndolo | 6 | 6 | | | | |
| | Francisco Cerúndolo | 6 | 6 | Francisco Cerúndolo | 3 | 7$^7$ | 6$^5$ |
| | | | | Sebastián Báez | 6 | 6$^5$ | 7$^7$ |
| | Sebastián Báez | 6 | 6 | Sebastián Báez | 6 | 6$^5$ | 7$^7$ |
| 2 | Andrej Martin | 4 | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 1 | F Coria | 6 | 6 | | | | | | | | | | | | | | |
| Q | V Sachko | 2 | 2 | | 1 | F Coria | 6 | 6 | | | | | | | | | |
| | G Clezar | 2 | 2 | | | MT Barrios Vera | 4 | 4 | | | | | | | | | |
| | MT Barrios Vera | 6 | 6 | | | | | | | 1 | F Coria | 5 | 7$^7$ | 6$^2$ | | | |
| | J Domingues | 4 | 6 | 7 | | | | | | | A Tabilo | 7 | 6$^4$ | 7$^7$ | | | |
| Q | C Gómez-Herrera | 6 | 4 | 5 | | J Domingues | 6$^5$ | 2 | | | | | | | | | |
| | A Tabilo | 6 | 7 | | | A Tabilo | 7$^7$ | 6 | | | | | | | | | |
| 7 | F Bagnis | 2 | 5 | | | | | | | | | | | | A Tabilo | 1 | 1 |
| Alt | C Ugo Carabelli | 1 | 7$^7$ | 2 | | | | | | | | | | | F Cerúndolo | 6 | 6 |
| WC | N Jarry | 6 | 6$^1$ | 6 | WC | N Jarry | 6 | 4 | 5 | | | | | | | | |
| | F Cerúndolo | 7 | 7 | | | F Cerúndolo | 4 | 6 | 7 | | | | | | | | |
| | A Collarini | 5 | 5 | | | | | | | | F Cerúndolo | 6 | 7$^7$ | | | | |
| | E Gómez | 6 | 1 | 6 | | | | | | 6 | T Seyboth Wild | 3 | 6$^4$ | | | | |
| WC | N Álvarez | 4 | 6 | 0 | | E Gómez | 1 | 2 | | | | | | | | | |
| | O Luz | 1 | 2 | | 6 | T Seyboth Wild | 6 | 6 | | | | | | | | | |
| 6 | T Seyboth Wild | 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 |
| 5 | DE Galán | 6 | 6 | | | | | | | | | | | | | | |
| Q | TA Tirante | 3 | 4 | | 5 | DE Galán | 5 | 2 | | | | | | | | | |
| WC | G Lama | 4 | 1 | | | S Báez | 7 | 6 | | | | | | | | | |
| | S Báez | 6 | 6 | | | | | | | | S Báez | 6 | 6 | | | | |
| Q | H Casanova | 3 | 7 | 6 | | | | | | 4 | H Dellien | 1 | 1 | | | | |
| | C Lindell | 6 | 5 | 1 | Q | H Casanova | 1 | 3 | | | | | | | | | |
| | F Meligeni Alves | 0 | 6$^7$ | | 4 | H Dellien | 6 | 6 | | | | | | | | | |
| 4 | H Dellien | 6 | 7$^9$ | | | | | | | | | | | | S Báez | 6 | 6 |
| 8 | D Altmaier | 4 | 6 | 6 | | | | | | | | | | 2 | A Martin | 4 | 3 |
| | JM Cerúndolo | 6 | 2 | 1 | 8 | D Altmaier | 1 | 6 | 6 | | | | | | | | |
| | L Klein | 7 | 6 | | | L Klein | 6 | 3 | 3 | | | | | | | | |
| | F Mena | 5 | 1 | | | | | | | 8 | D Altmaier | 6$^4$ | 3 | | | | |
| | P Sakamoto | 6 | 7$^7$ | | | | | | | 2 | A Martin | 7$^7$ | 6 | | | | |
| | G Andreozzi | 2 | 6$^3$ | | | P Sakamoto | 3 | 3 | | | | | | | | | |
| | J Menezes | 3 | 2 | | 2 | A Martin | 6 | 6 | | | | | | | | | |
| 2 | A Martin | 6 | 6 | | | | | | | | | | | | | | |