# 2021 Antalya Challenger II – Singles

Jaume Munar was the defending champion but lost in the final to Carlos Taberner 4–6, 1–6.
This was the second edition of the tournament and second of two editions of the tournament to start the 2021 ATP Challenger Tour year.

## Seeds

* João Sousa (first round)
* Jaume Munar (final)
* Daniel Elahi Galán (second round)
* Thiago Seyboth Wild (second round)
* Jozef Kovalík (quarterfinals)
* Facundo Bagnis (quarterfinals)
* Lorenzo Musetti (first round)
* Daniel Altmaier (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 |
| | Carlos Taberner | 7 | 6 | | | | |
| Q | Tomás Martín Etcheverry | 5 | 2 | | | | |
| Q | Tomás Martín Etcheverry | 5 | 2 | | Carlos Taberner | 6 | 6 |
| | | | | 2 | Jaume Munar | 4 | 1 |
| | Alessandro Giannessi | 0 | 0$^r$ | 2 | Jaume Munar | 4 | 1 |
| 2 | Jaume Munar | 6 | 2 | | | | |

### 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 |
| 1 | J Sousa | 1 | 4 | | | | | | | | | | | | | | |
| | C Taberner | 6 | 6 | | | C Taberner | 6 | 6$^5$ | 6 | | | | | | | | |
| Q | D Ajduković | 6 | 2 | 4 | | E Gómez | 0 | 7$^7$ | 1 | | | | | | | | |
| | E Gómez | 3 | 6 | 6 | | | | | | | C Taberner | 6 | 7$^7$ | | | | |
| Q | F Mena | 6$^4$ | 3 | | | | | | | 6 | F Bagnis | 3 | 6$^0$ | | | | |
| | D Popko | 7$^7$ | 6 | | | D Popko | 1 | 2 | | | | | | | | | |
| WC | M İlhan | 3 | 4 | | 6 | F Bagnis | 6 | 6 | | | | | | | | | |
| 6 | F Bagnis | 6 | 6 | | | | | | | | | | | | C Taberner | 7 | 6 |
| 4 | T Seyboth Wild | 6 | 6 | | | | | | | | | | | Q | TM Etcheverry | 5 | 2 |
| | L Giustino | 4 | 3 | | 4 | T Seyboth Wild | 2 | 6 | 4 | | | | | | | | |
| | J Menezes | 6 | 1 | 2 | Q | TM Etcheverry | 6 | 3 | 6 | | | | | | | | |
| Q | TM Etcheverry | 2 | 6 | 6 | | | | | | Q | TM Etcheverry | 6 | 6 | | | | |
| | P Lorenzi | 7 | 4 | 2 | | | | | | | L Mayer | 3 | 4 | | | | |
| Q | A Santillan | 5 | 6 | 6 | Q | A Santillan | 6$^4$ | 2 | | | | | | | | | |
| | L Mayer | 6 | 6 | | | L Mayer | 7$^7$ | 6 | | | | | | | | | |
| 7 | L Musetti | 4 | 3 | | | | | | | | | | | | | | |

### 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 | D Altmaier | 6$^2$ | 2 | | | | | | | | | | | | | | | |
| | A Giannessi | 7$^7$ | 6 | | | A Giannessi | 6 | 6 | | | | | | | | | | |
| | J Domingues | 1 | 4 | | | M Safwat | 3 | 4 | | | | | | | | | | |
| | M Safwat | 6 | 6 | | | | | | | | A Giannessi | 5 | 7 | 6 | | | | |
| | A Tabilo | 7$^8$ | 6 | | | | | | | | A Tabilo | 7 | 5 | 1 | | | | |
| WC | S Ağabigün | 6$^6$ | 1 | | | A Tabilo | 2 | 6 | 6 | | | | | | | | | |
| SE | T Robredo | 2 | 7 | 0 | 3 | DE Galán | 6 | 4 | 4 | | | | | | | | | |
| 3 | DE Galán | 6 | 5 | 6 | | | | | | | | | | | | A Giannessi | 0 | 0$^r$ |
| 5 | J Kovalík | 6 | 6 | | | | | | | | | | | | 2 | J Munar | 6 | 2 |
| SE | C İlkel | 3 | 1 | | 5 | J Kovalík | 6 | 6 | | | | | | | | | | |
| | T Griekspoor | 6 | 6 | | | T Griekspoor | 1 | 2 | | | | | | | | | | |
| Alt | E Escobedo | 3 | 2 | | | | | | | 5 | J Kovalík | 5 | 7$^7$ | 1 | | | | |
| LL | GM Moroni | 6 | 4 | 6$^6$ | | | | | | 2 | J Munar | 7 | 6$^3$ | 6 | | | | |
| | R Ramanathan | 4 | 6 | 7$^8$ | | R Ramanathan | 4 | 5 | | | | | | | | | | |
| WC | E Kırkın | 3 | 3 | | 2 | J Munar | 6 | 7 | | | | | | | | | | |
| 2 | J Munar | 6 | 6 | | | | | | | | | | | | | | | |