# 2021 Gran Canaria Challenger – Singles

This was the first edition of the tournament.
Enzo Couacaud won the title after defeating Steven Diez 7–6$^{(7–5)}$, 7–6$^{(7–3)}$ in the final.

## Seeds

* Lorenzo Musetti (second round)
* Carlos Taberner (first round, retired)
* Federico Gaio (first round)
* Nikola Milojević (semifinals)
* Danilo Petrović (first round)
* Lorenzo Giustino (first round)
* Alessandro Giannessi (second round)
* Filip Horanský (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 |
| Q | Alex Molčan | 2 | 6 | 5 | | | |
| | Steven Diez | 6 | 3 | 7 | | | |
| | Steven Diez | 6 | 3 | 7 | Steven Diez | 6$^5$ | 6$^3$ |
| | | | | | Enzo Couacaud | 7$^7$ | 7$^7$ |
| 4 | Nikola Milojević | 2 | 2 | | Enzo Couacaud | 7$^7$ | 7$^7$ |
| | Enzo Couacaud | 6 | 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | L Musetti | 6 | 7 | | | | | | | | | | | | | | | |
| Q | Àlex Martí Pujolràs | 3 | 5 | | 1 | L Musetti | 6$^5$ | 6$^4$ | | | | | | | | | | |
| Q | A Molčan | 6 | 6 | | Q | A Molčan | 7$^7$ | 7$^7$ | | | | | | | | | | |
| WC | Mark Owen Endler | 0 | 1 | | | | | | | Q | A Molčan | 6 | 6 | | | | | |
| | GM Moroni | 6 | 6 | | | | | | | 8 | F Horanský | 2 | 3 | | | | | |
| Q | M Guinard | 3 | 2 | | | GM Moroni | 6$^3$ | 4 | | | | | | | | | | |
| | G Oliveira | 6 | 4 | 1 | 8 | F Horanský | 7$^7$ | 6 | | | | | | | | | | |
| 8 | F Horanský | 1 | 6 | 6 | | | | | | | | | | Q | A Molčan | 2 | 6 | 5 |
| 3 | F Gaio | 3 | 3 | | | | | | | | | | | | S Diez | 6 | 3 | 7 |
| | B Kavčič | 6 | 6 | | | B Kavčič | 6 | 3 | 3 | | | | | | | | | |
| | N Kuhn | 4 | 4 | | | R Bonadio | 4 | 6 | 6 | | | | | | | | | |
| | R Bonadio | 6 | 6 | | | | | | | | R Bonadio | 3 | 0 | | | | | |
| Q | E Nava | 6$^4$ | 7$^7$ | 2 | | | | | | | S Diez | 6 | 6 | | | | | |
| | S Diez | 7$^7$ | 6$^4$ | 6 | | S Diez | 7$^8$ | 7$^{10}$ | | | | | | | | | | |
| | S Napolitano | 0 | 2 | | 7 | A Giannessi | 6$^6$ | 6$^8$ | | | | | | | | | | |
| 7 | A Giannessi | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | L Giustino | 6 | 3 | 4 | | | | | | | | | | | | | | |
| | R Ortega Olmedo | 1 | 6 | 6 | | R Ortega Olmedo | 4 | 5 | | | | | | | | | | |
| | A Pellegrino | 6 | 6 | | | A Pellegrino | 6 | 7 | | | | | | | | | | |
| | G García López | 4 | 3 | | | | | | | | A Pellegrino | 6 | 1 | 4 | | | | |
| | C Lestienne | 6 | 6 | | | | | | | 4 | N Milojević | 4 | 6 | 6 | | | | |
| | A Menéndez Maceiras | 1 | 4 | | | C Lestienne | 2 | 4 | | | | | | | | | | |
| WC | J Barranco Cosano | 6 | 4 | 3 | 4 | N Milojević | 6 | 6 | | | | | | | | | | |
| 4 | N Milojević | 4 | 6 | 6 | | | | | | | | | | | 4 | N Milojević | 2 | 2 |
| 5 | D Petrović | 1 | 1 | | | | | | | | | | | | | E Couacaud | 6 | 6 |
| | K Coppejans | 6 | 6 | | | K Coppejans | 6 | 3 | 3 | | | | | | | | | |
| WC | C Gimeno Valero | 6 | 6$^7$ | 3 | | M Trungelliti | 1 | 6 | 6 | | | | | | | | | |
| | M Trungelliti | 1 | 7$^9$ | 6 | | | | | | | M Trungelliti | 1 | 6 | 6$^6$ | | | | |
| Alt | N Serdarušić | 0 | 4 | | | | | | | | E Couacaud | 6 | 0 | 7$^8$ | | | | |
| | T Robredo | 6 | 6 | | | T Robredo | 1 | 2 | | | | | | | | | | |
| | E Couacaud | 7$^7$ | 0 | 2 | | E Couacaud | 6 | 6 | | | | | | | | | | |
| 2 | C Taberner | 6$^3$ | 6 | 3$^r$ | | | | | | | | | | | | | | |