# 2021 Tenerife Challenger – Singles

This was the first edition of the tournament.
Tallon Griekspoor won the title after defeating Feliciano López 6–4, 6–4 in the final.

## Seeds

* Tallon Griekspoor (champion)
* Feliciano López (final)
* Fernando Verdasco (semifinals)
* Quentin Halys (second round)
* Emilio Gómez (first round)
* Altuğ Çelikbilek (quarterfinals)
* Elias Ymer (second round)
* João Sousa (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 | Tallon Griekspoor | 7$^7$ | 6$^7$ | 6 | | | | |
| 3/WC | Fernando Verdasco | 6$^5$ | 7$^9$ | 3 | | | | |
| 3/WC | Fernando Verdasco | 6$^5$ | 7$^9$ | 3 | 1 | Tallon Griekspoor | 6 | 6 |
| | | | | | 2/WC | Feliciano López | 4 | 4 |
| | Andrey Kuznetsov | 1 | 6$^3$ | | 2/WC | Feliciano López | 4 | 4 |
| 2/WC | Feliciano López | 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | T Griekspoor | 6 | 6 | | | | | | | | | | | | | | | |
| | E Kırkın | 2 | 2 | | 1 | T Griekspoor | 6 | 6 | | | | | | | | | | |
| | M Polmans | 7 | 3 | 0 | Q | Y Bondarevskiy | 4 | 4 | | | | | | | | | | |
| Q | Yan Bondarevskiy | 5 | 6 | 6 | | | | | | 1 | T Griekspoor | 6 | 7 | | | | | |
| | J Clarke | 2 | 6$^5$ | | | | | | | 6 | A Çelikbilek | 3 | 5 | | | | | |
| | C-h Tseng | 6 | 7$^7$ | | | C-h Tseng | 7 | 3 | 6$^3$ | | | | | | | | | |
| | T Skatov | 3 | 0 | | 6 | A Çelikbilek | 5 | 6 | 7$^7$ | | | | | | | | | |
| 6 | A Çelikbilek | 6 | 6 | | | | | | | | | | | 1 | T Griekspoor | 7$^7$ | 6$^7$ | 6 |
| 3/WC | F Verdasco | 6 | 5 | 6 | | | | | | | | | | 3/WC | F Verdasco | 6$^5$ | 7$^9$ | 3 |
| | GM Moroni | 1 | 7 | 2 | 3/WC | F Verdasco | 6 | 6 | | | | | | | | | | |
| WC | D Rincón | 3 | 5 | | | L Giustino | 2 | 2 | | | | | | | | | | |
| | L Giustino | 6 | 7 | | | | | | | 3/WC | F Verdasco | 6 | 7$^7$ | | | | | |
| | N Borges | 1 | 6 | 6 | | | | | | | N Borges | 3 | 6$^3$ | | | | | |
| | K Coppejans | 6 | 2 | 2 | | N Borges | 7 | 6 | | | | | | | | | | |
| | H Moriya | 6$^4$ | 4 | | 7 | E Ymer | 5 | 4 | | | | | | | | | | |
| 7 | E Ymer | 7$^7$ | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | J Sousa | 5 | 6 | 7$^7$ | | | | | | | | | | | | | | |
| Q | V Orlov | 7 | 3 | 6$^1$ | 8 | J Sousa | 7 | 6 | | | | | | | | | | |
| | T Fabbiano | 2 | 6 | 4 | | M Guinard | 5 | 0 | | | | | | | | | | |
| | M Guinard | 6 | 3 | 6 | | | | | | 8 | J Sousa | 6$^6$ | 3 | | | | | |
| | A Kuznetsov | 6 | 6 | | | | | | | | A Kuznetsov | 7$^8$ | 6 | | | | | |
| LL | FC Jianu | 4 | 2 | | | A Kuznetsov | 6 | 7$^8$ | | | | | | | | | | |
| Q | A Shevchenko | 7$^7$ | 4 | 2 | 4 | Q Halys | 3 | 6$^6$ | | | | | | | | | | |
| 4 | Q Halys | 6$^4$ | 6 | 6 | | | | | | | | | | | | A Kuznetsov | 1 | 6$^3$ |
| 5 | E Gómez | 5 | 4 | | | | | | | | | | | | 2/WC | F López | 6 | 7$^7$ |
| | M Geerts | 7 | 6 | | | M Geerts | 5 | 6 | 6$^3$ | | | | | | | | | |
| | R Peniston | 5 | 6 | 6 | | R Peniston | 7 | 4 | 7$^7$ | | | | | | | | | |
| PR | J De Loore | 7 | 3 | 3 | | | | | | | R Peniston | 2 | 7$^7$ | 1 | | | | |
| | F Ferreira Silva | 6 | 6 | | | | | | | 2/WC | F López | 6 | 6$^5$ | 6 | | | | |
| Q | ND Ionel | 1 | 0 | | | F Ferreira Silva | 6$^3$ | 3 | | | | | | | | | | |
| | D Svrčina | 4 | 6 | 4 | 2/WC | F López | 7$^7$ | 6 | | | | | | | | | | |
| 2/WC | F López | 6 | 1 | 6 | | | | | | | | | | | | | | |