# 2021 Salinas Challenger – Singles

Víctor Estrella Burgos was the defending champion but chose not to defend his title.
Nicolás Jarry won the title after defeating Nicolás Mejía 7–6$^{(9–7)}$, 6–1 in the final.

## Seeds

* Yasutaka Uchiyama (first round, retired)
* Alejandro Tabilo (first round)
* Emilio Gómez (first round)
* Christopher Eubanks (second round)
* Marcelo Tomás Barrios Vera (quarterfinals)
* Altuğ Çelikbilek (semifinals)
* Hiroki Moriya (first round)
* Roberto Quiroz (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 | Final | Final | Final | Final |
| 6 | Altuğ Çelikbilek | 3 | 5 | | | | |
| Q | Nicolás Mejía | 6 | 7 | | | | |
| Q | Nicolás Mejía | 6 | 7 | Q | Nicolás Mejía | 6$^7$ | 1 |
| | | | | WC | Nicolás Jarry | 7$^9$ | 6 |
| | Camilo Ugo Carabelli | 5 | 3 | WC | Nicolás Jarry | 7$^9$ | 6 |
| WC | Nicolás Jarry | 7 | 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 | Y Uchiyama | 2 | 0$^r$ | | | | | | | | | | | | | | | |
| | T van Rijthoven | 6 | 4 | | | T van Rijthoven | 6 | 7 | | | | | | | | | | |
| | S Mansouri | 2 | 2 | | | A Dougaz | 2 | 5 | | | | | | | | | | |
| | A Dougaz | 6 | 6 | | | | | | | | T van Ritjhoven | 3 | 6 | 6$^6$ | | | | |
| | N Chappell | 3 | 2 | | | | | | | 6 | A Çelikbilek | 6 | 2 | 7$^8$ | | | | |
| | R Ortega Olmedo | 6 | 6 | | | R Ortega Olmedo | 6 | 4 | 4 | | | | | | | | | |
| | JC Aragone | 2 | 6$^2$ | | 6 | A Çelikbilek | 1 | 6 | 6 | | | | | | | | | |
| 6 | A Çelikbilek | 6 | 7$^7$ | | | | | | | | | | | | 6 | A Çelikbilek | 3 | 5 |
| 3 | E Gómez | 4 | 6 | 2 | | | | | | | | | | | Q | N Mejía | 6 | 7 |
| | H Casanova | 6 | 3 | 6 | | H Casanova | 1 | 2 | | | | | | | | | | |
| WC | D Hidalgo | 3 | 6 | 5 | Q | N Mejía | 6 | 6 | | | | | | | | | | |
| Q | N Mejía | 6 | 1 | 7 | | | | | | Q | N Mejía | 2 | 6 | 7$^7$ | | | | |
| | J Sels | 6 | 6 | | | | | | | 5 | MT Barrios Vera | 6 | 1 | 6$^3$ | | | | |
| WC | AC March | 4 | 3 | | | J Sels | 2 | 2 | | | | | | | | | | |
| Q | F Díaz Acosta | 2 | 2 | | 5 | MT Barrios Vera | 6 | 6 | | | | | | | | | | |
| 5 | MT Barrios Vera | 6 | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | R Quiroz | 6 | 1 | 6$^7$ | | | | | | | | | | | | |
| | C Ugo Carabelli | 4 | 6 | 7$^9$ | | C Ugo Carabelli | 6 | 6 | | | | | | | | |
| Q | M Gengel | 2 | 3 | | Q | TK Wang | 1 | 1 | | | | | | | | |
| Q | TK Wang | 6 | 6 | | | | | | | C Ugo Carabelli | 6 | 6 | | | | |
| | K Uchida | 4 | 4 | | | | | | | A Menéndez Maceiras | 4 | 4 | | | | |
| | A Menéndez Maceiras | 6 | 6 | | | A Menéndez Maceiras | 7$^8$ | 6 | | | | | | | | |
| | J de Jong | 6$^3$ | 6$^3$ | | 4 | C Eubanks | 6$^6$ | 1 | | | | | | | | |
| 4 | C Eubanks | 7$^7$ | 7$^7$ | | | | | | | | | | | C Ugo Carabelli | 5 | 3 |
| 7 | H Moriya | 1 | 6$^5$ | | | | | | | | | | WC | N Jarry | 7 | 6 |
| | Shuichi Sekiguchi | 6 | 7$^7$ | | | S Sekiguchi | 1 | 2 | | | | | | | | |
| | N Álvarez | 1 | 1 | | WC | N Jarry | 6 | 6 | | | | | | | | |
| WC | N Jarry | 6 | 6 | | | | | | WC | N Jarry | 7$^7$ | 6 | | | | |
| | V Orlov | 2 | 7$^7$ | 3 | | | | | | TA Tirante | 6$^3$ | 4 | | | | |
| | TA Tirante | 6 | 6$^4$ | 6 | | TA Tirante | 6 | 6 | | | | | | | | |
| | K King | 3 | 6 | 6 | | K King | 1 | 2 | | | | | | | | |
| 2 | A Tabilo | 6 | 4 | 1 | | | | | | | | | | | | |