# 2021 Open de Tenis Ciudad de Pozoblanco – Singles

Roberto Bautista Agut was the defending champion but chose not to defend his title.
Altuğ Çelikbilek won the title after defeating Cem İlkel 6–1, 6–7$^{(2–7)}$, 6–3 in the final.

## Seeds

* Benjamin Bonzi (second round)
* Grégoire Barrère (semifinals, retired)
* Altuğ Çelikbilek (champion)
* Cem İlkel (final)
* Maxime Janvier (second round)
* Borna Gojo (first round)
* Yannick Maden (first round)
* Nicola Kuhn (first round, retired)

## 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 | Final |
| Q | Michael Geerts | 2 | 7$^7$ | 4 | | | | | |
| 4 | Cem İlkel | 6 | 6$^3$ | 6 | | | | | |
| 4 | Cem İlkel | 6 | 6$^3$ | 6 | 4 | Cem İlkel | 1 | 7$^7$ | 3 |
| | | | | | 3 | Altuğ Çelikbilek | 6 | 6$^2$ | 6 |
| 3 | Altuğ Çelikbilek | 4 | 6 | 1 | 3 | Altuğ Çelikbilek | 6 | 6$^2$ | 6 |
| 2 | Grégoire Barrère | 6 | 3 | 1$^r$ | | | | | |

### 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 | B Bonzi | 4 | 6 | 6 | | | | | | | | | | | | | | |
| | A Dougaz | 6 | 4 | 3 | 1 | B Bonzi | 6$^3$ | 2 | | | | | | | | | | |
| Q | M Geerts | 6 | 6 | | Q | M Geerts | 7$^7$ | 6 | | | | | | | | | | |
| | K Uchida | 1 | 2 | | | | | | | Q | M Geerts | 7$^7$ | 7$^7$ | | | | | |
| | M Viola | 6 | 6 | | | | | | | Q | E Nava | 6$^2$ | 6$^3$ | | | | | |
| | T Bellucci | 1 | 3 | | | M Viola | 5 | 6 | 3 | | | | | | | | | |
| Q | E Nava | 6 | 7$^7$ | | Q | E Nava | 7 | 4 | 6 | | | | | | | | | |
| 7 | Y Maden | 1 | 6$^5$ | | | | | | | | | | | Q | M Geerts | 2 | 7$^7$ | 4 |
| 4 | C İlkel | 6 | 7$^7$ | | | | | | | | | | | 4 | C İlkel | 6 | 6$^3$ | 6 |
| | J Härteis | 2 | 6$^3$ | | 4 | C İlkel | 6 | 6 | | | | | | | | | | |
| Alt | C Gómez-Herrera | 6 | 3 | 0 | | H Moriya | 3 | 2 | | | | | | | | | | |
| | H Moriya | 3 | 6 | 6 | | | | | | 4 | C İlkel | 7 | 7$^7$ | | | | | |
| | T van Rijthoven | 6 | 6$^3$ | 7 | | | | | | | T van Rijthoven | 5 | 6$^5$ | | | | | |
| | R Ortega Olmedo | 3 | 7$^7$ | 5 | | T van Rijthoven | 6 | 6 | | | | | | | | | | |
| | I Sijsling | 7 | 0 | | | I Sijsling | 4 | 4 | | | | | | | | | | |
| 8 | N Kuhn | 5 | 0$^r$ | | | | | | | | | | | | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | M Janvier | 6$^3$ | 6 | 7$^{14}$ | | | | | | | | | | | | | | |
| Q | M Bourgue | 7$^7$ | 2 | 6$^{12}$ | 5 | M Janvier | 6$^4$ | 3 | | | | | | | | | | |
| WC | A Barroso Campos | 2 | 4 | | | A Menéndez Maceiras | 7$^7$ | 6 | | | | | | | | | | |
| | A Menéndez Maceiras | 6 | 6 | | | | | | | | A Menéndez Maceiras | 3 | 0 | | | | | |
| Q | M Martineau | 4 | 6 | 4 | | | | | | 3 | A Çelikbilek | 6 | 6 | | | | | |
| | T Gabashvili | 6 | 1 | 6 | | T Gabashvili | 7 | 3 | 4 | | | | | | | | | |
| Alt | S Mansouri | 7$^7$ | 1 | 6$^4$ | 3 | A Çelikbilek | 5 | 6 | 6 | | | | | | | | | |
| 3 | A Çelikbilek | 6$^3$ | 6 | 7$^7$ | | | | | | | | | | 3 | A Çelikbilek | 4 | 6 | 1 |
| 6 | B Gojo | 4 | 6$^4$ | | | | | | | | | | | 2 | G Barrère | 6 | 3 | 1$^r$ |
| LL | F Zeballos | 6 | 7$^7$ | | LL | F Zeballos | 7$^8$ | 6 | | | | | | | | | | |
| | FC Jianu | 6 | 6 | | | FC Jianu | 6$^6$ | 4 | | | | | | | | | | |
| WC | N Álvarez Varona | 2 | 4 | | | | | | | LL | F Zeballos | 4 | 3 | | | | | |
| | A Andreev | 6 | 6 | | | | | | | 2 | G Barrère | 6 | 6 | | | | | |
| WC | Blas Ruiz Romero | 0 | 0 | | | A Andreev | 3 | 0 | | | | | | | | | | |
| Alt | R Roumane | 6$^5$ | 3 | | 2 | G Barrère | 6 | 6 | | | | | | | | | | |
| 2 | G Barrère | 7$^7$ | 6 | | | | | | | | | | | | | | | |