# 2021 ATP Salzburg Open – Singles

This was the first edition of the tournament.
Facundo Bagnis won the title after defeating Federico Coria 6–4, 3–6, 6–2 in the final.

## Seeds

* Thiago Monteiro (first round)
* Pablo Cuevas (quarterfinals)
* Federico Coria (final)
* Facundo Bagnis (champion)
* Roberto Carballés Baena (second round)
* Taro Daniel (first round)
* Daniel Elahi Galán (first round)
* Carlos Taberner (second 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 | Nicolás Jarry | 4 | 4 | | | | | |
| 4 | Facundo Bagnis | 6 | 6 | | | | | |
| 4 | Facundo Bagnis | 6 | 6 | 4 | Facundo Bagnis | 6 | 3 | 6 |
| | | | | 3 | Federico Coria | 4 | 6 | 2 |
| 3 | Federico Coria | 6 | 6 | 3 | Federico Coria | 4 | 6 | 2 |
| | Juan Ignacio Londero | 1 | 4 | | | | | |

### 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 | T Monteiro | 7$^7$ | 6$^4$ | 6$^4$ | | | | | | | | | | | | | |
| Q | N Jarry | 6$^2$ | 7$^7$ | 7$^7$ | Q | N Jarry | 6 | 6 | | | | | | | | | |
| | F Cerúndolo | 3 | 6 | 3 | WC | P Heller | 2 | 4 | | | | | | | | | |
| WC | Peter Heller | 6 | 3 | 6 | | | | | | Q | N Jarry | 7$^8$ | 6 | | | | |
| WC | Jakob Aichhorn | 4 | 3 | | | | | | | Q | J Lehečka | 6$^6$ | 4 | | | | |
| Q | J Lehečka | 6 | 6 | | Q | J Lehečka | 6 | 6 | | | | | | | | | |
| | A Müller | 7 | 7$^7$ | | | A Müller | 2 | 4 | | | | | | | | | |
| 7 | DE Galán | 5 | 6$^3$ | | | | | | | | | | | Q | N Jarry | 4 | 4 |
| 4 | F Bagnis | 6 | 6 | | | | | | | | | | | 4 | F Bagnis | 6 | 6 |
| | T Seyboth Wild | 3 | 2 | | 4 | F Bagnis | 6 | 6 | | | | | | | | | |
| | H Gaston | 6 | 6 | | | H Gaston | 4 | 1 | | | | | | | | | |
| | M Bachinger | 4 | 3 | | | | | | | 4 | F Bagnis | 6 | 6 | | | | |
| | D Džumhur | 6 | 6 | | | | | | | | D Džumhur | 1 | 2 | | | | |
| | F Mena | 4 | 0 | | | D Džumhur | 7$^7$ | 6$^5$ | 6 | | | | | | | | |
| Alt | M Viola | 4 | 4 | | 8 | C Taberner | 6$^2$ | 7$^7$ | 2 | | | | | | | | |
| 8 | C Taberner | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | R Carballés Baena | 6 | 4 | 6 | | | | | | | | | | | | | |
| WC | M Neuchrist | 4 | 6 | 4 | 5 | R Carballés Baena | 7 | 2 | 6$^4$ | | | | | | | | |
| | B Rola | 7 | 7$^7$ | | | B Rola | 5 | 6 | 7$^7$ | | | | | | | | |
| | D Novak | 5 | 6$^4$ | | | | | | | | B Rola | 2 | 6$^5$ | | | | |
| | M-A Hüsler | 6 | 6 | | | | | | | 3 | F Coria | 6 | 7$^7$ | | | | |
| | L Rosol | 3 | 4 | | | M-A Hüsler | 1 | 6 | 4 | | | | | | | | |
| PR | G Melzer | 3 | 4 | | 3 | F Coria | 6 | 4 | 6 | | | | | | | | |
| 3 | F Coria | 6 | 6 | | | | | | | | | | | 3 | F Coria | 6 | 6 |
| 6 | T Daniel | 4 | 4 | | | | | | | | | | | | JI Londero | 1 | 4 |
| | JI Londero | 6 | 6 | | | JI Londero | 6 | 2 | 6 | | | | | | | | |
| LL | A Vatutin | 2 | 6 | 6 | LL | A Vatutin | 0 | 6 | 0 | | | | | | | | |
| Q | A Erler | 6 | 4 | 2 | | | | | | | JI Londero | 6 | 6 | | | | |
| | E Gulbis | 2 | 6$^4$ | | | | | | | 2 | P Cuevas | 3 | 0 | | | | |
| | D Petrović | 6 | 7$^7$ | | | D Petrović | 1 | 4 | | | | | | | | | |
| Q | D Yevseyev | 5 | 3 | | 2 | P Cuevas | 6 | 6 | | | | | | | | | |
| 2 | P Cuevas | 7 | 6 | | | | | | | | | | | | | | |