# 2021 Gran Canaria Challenger II – Singles

This was the second edition of the tournament in the 2021 tennis season. Enzo Couacaud was the defending champion but lost in the second round to Alex Molčan.
Carlos Gimeno Valero won the title after defeating Kimmer Coppejans 6–4, 6–2 in the final.

## Seeds

* Carlos Alcaraz (second round)
* Federico Gaio (second round)
* Nikola Milojević (second round)
* Danilo Petrović (first round, retired)
* Lorenzo Giustino (first round)
* Alessandro Giannessi (quarterfinals)
* Filip Horanský (second round)
* Kimmer Coppejans (final)

## 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 |
| 8 | Kimmer Coppejans | 7$^7$ | 6 | | | | | |
| Q | Eduard Esteve Lobato | 6$^1$ | 2 | | | | | |
| Q | Eduard Esteve Lobato | 6$^1$ | 2 | | 8 | Kimmer Coppejans | 4 | 2 |
| | | | | | WC | Carlos Gimeno Valero | 6 | 6 |
| | Blaž Kavčič | 6 | 1 | 5 | WC | Carlos Gimeno Valero | 6 | 6 |
| WC | Carlos Gimeno Valero | 3 | 6 | 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/WC | C Alcaraz | 6 | 6$^3$ | 6 | | | | | | | | | | | | | | |
| Q | FC Jianu | 3 | 7$^7$ | 1 | 1/WC | C Alcaraz | 6$^5$ | 3 | | | | | | | | | | |
| | A Menéndez Maceiras | 0 | 2 | | | M Trungelliti | 7$^7$ | 6 | | | | | | | | | | |
| | M Trungelliti | 6 | 6 | | | | | | | | M Trungelliti | 6$^4$ | 7 | 0 | | | | |
| | N Kuhn | 2 | 2 | | | | | | | 8 | K Coppejans | 7$^7$ | 5 | 6 | | | | |
| | S Diez | 6 | 6 | | | S Diez | 6 | 0 | 5 | | | | | | | | | |
| | G Oliveira | 5 | 6$^2$ | | 8 | K Coppejans | 2 | 6 | 7 | | | | | | | | | |
| 8 | K Coppejans | 7 | 7$^7$ | | | | | | | | | | | | 8 | K Coppejans | 7$^7$ | 6 |
| 3 | N Milojević | 6 | 6 | | | | | | | | | | | | Q | E Esteve Lobato | 6$^1$ | 2 |
| | T Robredo | 2 | 3 | | 3 | N Milojević | 5 | 3 | | | | | | | | | | |
| Q | Eduard Esteve Lobato | 7$^7$ | 6 | | Q | E Esteve Lobato | 7 | 6 | | | | | | | | | | |
| | G García López | 6$^4$ | 2 | | | | | | | Q | E Esteve Lobato | 6 | 5 | 6 | | | | |
| Q | G Zeppieri | 6 | 6 | | | | | | | Q | G Zeppieri | 4 | 7 | 4 | | | | |
| | M Guinard | 0 | 3 | | Q | G Zeppieri | 7$^9$ | 6 | | | | | | | | | | |
| LL | S Ehrat | 6$^9$ | 7 | 3 | 7 | F Horanský | 6$^7$ | 1 | | | | | | | | | | |
| 7 | F Horanský | 7$^{11}$ | 5 | 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 | Semifinals |
| 5 | L Giustino | 6$^2$ | 7 | 1 | | | | | | | | | | | | | | | |
| | E Couacaud | 7$^7$ | 5 | 6 | | E Couacaud | 2 | 4 | | | | | | | | | | | |
| | R Ortega Olmedo | 3 | 6$^4$ | | | A Molčan | 6 | 6 | | | | | | | | | | | |
| | A Molčan | 6 | 7$^7$ | | | | | | | | A Molčan | 4 | 5 | | | | | | |
| | B Kavčič | 6 | 6 | | | | | | | | B Kavčič | 6 | 7 | | | | | | |
| | M Vrbenský | 4 | 4 | | | B Kavčič | 6 | 6 | | | | | | | | | | | |
| | R Bonadio | 5 | | | | R Bonadio | 2 | 4 | | | | | | | | | | | |
| 4 | D Petrović | 2$^r$ | | | | | | | | | | | | | | B Kavčič | 6 | 1 | 5 |
| 6 | A Giannessi | 6 | 6 | | | | | | | | | | | | WC | C Gimeno Valero | 3 | 6 | 7 |
| Q | E Nava | 2 | 3 | | 6 | A Giannessi | 7$^{11}$ | 7 | | | | | | | | | | | |
| WC | N Sánchez Izquierdo | 5 | 7 | 6 | WC | N Sánchez Izquierdo | 6$^9$ | 5 | | | | | | | | | | | |
| | A Pellegrino | 7 | 5 | 3 | | | | | | 6 | A Giannessi | 2 | 6 | 2 | | | | | |
| | C Lestienne | 4 | 1$^r$ | | | | | | | WC | C Gimeno Valero | 6 | 4 | 6 | | | | | |
| WC | C Gimeno Valero | 6 | 3 | | WC | C Gimeno Valero | 6 | 3 | 6 | | | | | | | | | | |
| Alt | J Barranco Cosano | 7$^7$ | 2 | 2 | 2 | F Gaio | 0 | 6 | 3 | | | | | | | | | | |
| 2 | F Gaio | 6$^3$ | 6 | 6 | | | | | | | | | | | | | | | |