# 2020 Sánchez-Casal Cup – Singles

Salvatore Caruso was the defending champion and chose not to defend his title.
Carlos Alcaraz won the title after defeating Damir Džumhur 4–6, 6–2, 6–1 in the final.

## Seeds

* Jaume Munar (quarterfinals)
* Christopher O'Connell (second round, retired)
* Pedro Sousa (first round)
* Damir Džumhur (final)
* Facundo Bagnis (quarterfinals)
* Bradley Klahn (withdrew)
* Bernabé Zapata Miralles (first round)
* Carlos Taberner (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 | Final |
| Q | Andrea Collarini | 3 | 5 | | | | | |
| | Carlos Alcaraz | 6 | 7 | | | | | |
| | Carlos Alcaraz | 6 | 7 | | Carlos Alcaraz | 4 | 6 | 6 |
| | | | | 4 | Damir Džumhur | 6 | 2 | 1 |
| 4 | Damir Džumhur | 6 | 6 | 4 | Damir Džumhur | 6 | 2 | 1 |
| WC | Carlos Gimeno Valero | 0 | 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 | Semifinals |
| 1 | J Munar | 7 | 6 | | | | | | | | | | | | | | | |
| | B van de Zandschulp | 5 | 1 | | 1 | J Munar | 3 | 7 | 6 | | | | | | | | | |
| Q | MT Barrios Vera | 7$^7$ | 6 | | Q | MT Barrios Vera | 6 | 5 | 1 | | | | | | | | | |
| | E Escobedo | 6$^2$ | 3 | | | | | | | 1 | J Munar | 5 | 4 | | | | | |
| Q | A Collarini | 7$^7$ | 7 | | | | | | | Q | A Collarini | 7 | 6 | | | | | |
| | E Gómez | 6$^5$ | 5 | | Q | A Collarini | 7 | 7 | | | | | | | | | | |
| Q | B Nakashima | 6 | 6 | | Q | B Nakashima | 5 | 5 | | | | | | | | | | |
| LL | R Olivo | 2 | 3 | | | | | | | | | | | | Q | A Collarini | 3 | 5 |
| 3 | P Sousa | 3 | 3 | | | | | | | | | | | | | C Alcaraz | 6 | 7 |
| | C Alcaraz | 6 | 6 | | | C Alcaraz | 6 | 4 | 6 | | | | | | | | | |
| | A Vukic | 6 | 3 | 6$^5$ | | M Vilella Martínez | 3 | 6 | 2 | | | | | | | | | |
| | M Vilella Martínez | 2 | 6 | 7$^7$ | | | | | | | C Alcaraz | 7 | 4 | 6 | | | | |
| SE | F Cerúndolo | 1 | 4 | | | | | | | | F Horanský | 5 | 6 | 4 | | | | |
| | L Giustino | 6 | 6 | | | L Giustino | 3 | 6 | 2 | | | | | | | | | |
| | F Horanský | 7 | 2 | 6 | | F Horanský | 6 | 3 | 6 | | | | | | | | | |
| 7 | B Zapata Miralles | 5 | 6 | 2 | | | | | | | | | | | | | | |

### 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 | C Taberner | 7$^7$ | 2 | 1 | | | | | | | | | | | | | | |
| LL | M Janvier | 6$^5$ | 6 | 6 | LL | M Janvier | 6 | 3 | 6 | | | | | | | | | |
| LL | P Polansky | 2 | 4 | | | A Giannessi | 4 | 6 | 2 | | | | | | | | | |
| | A Giannessi | 6 | 6 | | | | | | | LL | M Janvier | 6 | 1 | 3 | | | | |
| | K Coppejans | 6 | 7 | | | | | | | 4 | D Džumhur | 3 | 6 | 6 | | | | |
| WC | R Ramanathan | 2 | 5 | | | K Coppejans | 2 | 3 | | | | | | | | | | |
| PR | M Marterer | 2 | 0 | | 4 | D Džumhur | 6 | 6 | | | | | | | | | | |
| 4 | D Džumhur | 6 | 6 | | | | | | | | | | | | 4 | D Džumhur | 6 | 6 |
| 5 | F Bagnis | 7$^7$ | 6 | | | | | | | | | | | | WC | C Gimeno Valero | 0 | 3 |
| | J Domingues | 6$^5$ | 4 | | 5 | F Bagnis | 7 | 6 | | | | | | | | | | |
| | D Popko | 7 | 6 | | | D Popko | 5 | 2 | | | | | | | | | | |
| WC | N Kuhn | 5 | 4 | | | | | | | 5 | F Bagnis | 0 | 2 | | | | | |
| WC | C Gimeno Valero | 6 | 6 | | | | | | | WC | C Gimeno Valero | 6 | 6 | | | | | |
| Q | E Couacaud | 3 | 2 | | WC | C Gimeno Valero | 6$^5$ | 2 | | | | | | | | | | |
| | A Bolt | 1 | 2 | | 2 | C O'Connell | 7$^7$ | 5$^r$ | | | | | | | | | | |
| 2 | C O'Connell | 6 | 6 | | | | | | | | | | | | | | | |