# 2023 Upper Austria Open – Singles

Jurij Rodionov was the defending champion but chose not to defend his title.
Hamad Međedović won the title after defeating Filip Misolic 6–2, 6–7$^{(5–7)}$, 6–4 in the final.

## Seeds

* Dominic Thiem (semifinals)
* Hugo Gaston (quarterfinals)
* Facundo Bagnis (quarterfinals)
* Gijs Brouwer (first round)
* Filip Misolic (final)
* Sebastian Ofner (semifinals)
* Leandro Riedi (second round, retired)
* Dennis Novak (quarterfinals)

## 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 |
| 1 | Dominic Thiem | 6$^3$ | 2 | | | | | |
| | Hamad Međedović | 7$^7$ | 6 | | | | | |
| | Hamad Međedović | 7$^7$ | 6 | | Hamad Međedović | 6 | 6$^5$ | 6 |
| | | | | 5 | Filip Misolic | 2 | 7$^7$ | 4 |
| 5 | Filip Misolic | 7$^7$ | 6 | 5 | Filip Misolic | 2 | 7$^7$ | 4 |
| 6 | Sebastian Ofner | 6$^1$ | 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 | D Thiem | 6 | 6 | | | | | | | | | | | | | | |
| Q | Matthias Ujvary | 4 | 2 | | 1 | D Thiem | 6 | 6 | | | | | | | | | |
| | F Delbonis | 6 | 6$^6$ | 6 | | F Delbonis | 1 | 4 | | | | | | | | | |
| Alt | M Guinard | 2 | 7$^8$ | 2 | | | | | | 1 | D Thiem | 6 | 6 | | | | |
| | D Prižmić | 6 | 6$^5$ | 6 | | | | | | | D Prižmić | 3 | 3 | | | | |
| | M Zekić | 3 | 7$^7$ | 3 | | D Prižmić | 7 | 4 | | | | | | | | | |
| | A Andreev | 7$^7$ | 4 | 6$^6$ | 7 | L Riedi | 5 | 0$^r$ | | | | | | | | | |
| 7 | L Riedi | 6$^5$ | 6 | 7$^8$ | | | | | | | | | | 1 | D Thiem | 6$^3$ | 2 |
| 4 | G Brouwer | 4 | 6 | 3 | | | | | | | | | | | H Međedović | 7$^7$ | 6 |
| | A Ritschard | 6 | 3 | 6 | | A Ritschard | 3 | 1 | | | | | | | | | |
| Q | Lucas Gerch | 1 | 3 | | | H Međedović | 6 | 6 | | | | | | | | | |
| | H Međedović | 6 | 6 | | | | | | | | H Međedović | 7 | 6 | | | | |
| WC | Sandro Kopp | 1 | 2 | | | | | | | 8 | D Novak | 5 | 3 | | | | |
| Alt | A Lazarov | 6 | 3$^r$ | | WC | S Kopp | 5 | 6 | 3 | | | | | | | | |
| | H Mayot | 6 | 3 | 2 | 8 | D Novak | 7 | 3 | 6 | | | | | | | | |
| 8 | D Novak | 2 | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | F Misolic | 4 | 6 | 6 | | | | | | | | | | | | | | |
| | G Mpetshi Perricard | 6 | 3 | 2 | 5 | F Misolic | 7 | 6 | | | | | | | | | | |
| Q | M Copil | 6$^5$ | 6 | 6 | Q | M Copil | 5 | 3 | | | | | | | | | | |
| Q | H Jebens | 7$^7$ | 3 | 4 | | | | | | 5 | F Misolic | 3 | 6 | 6 | | | | |
| WC | G Melzer | 7$^7$ | 1 | 6 | | | | | | 3 | F Bagnis | 6 | 4 | 1 | | | | |
| Alt | J McCabe | 6$^1$ | 6 | 0 | WC | G Melzer | 4 | 6 | 3 | | | | | | | | | |
| | M Neuchrist | 1 | 1 | | 3 | F Bagnis | 6 | 4 | 6 | | | | | | | | | |
| 3 | F Bagnis | 6 | 6 | | | | | | | | | | | | 5 | F Misolic | 7$^7$ | 6 |
| 6 | S Ofner | 6$^2$ | 6 | 7 | | | | | | | | | | | 6 | S Ofner | 6$^1$ | 4 |
| Alt | L Wessels | 7$^7$ | 4 | 5 | 6 | S Ofner | 6 | 7$^7$ | | | | | | | | | | |
| Q | D Wenger | 6 | 5 | 6 | Q | D Wenger | 2 | 6$^0$ | | | | | | | | | | |
| Q | M Bašić | 4 | 7 | 3 | | | | | | 6 | S Ofner | 3 | 6 | 7$^7$ | | | | |
| WC | L Neumayer | 4 | 6 | 3 | | | | | | 2 | H Gaston | 6 | 3 | 6$^4$ | | | | |
| | D Sweeny | 6 | 1 | 6 | | D Sweeny | 4 | 5 | | | | | | | | | | |
| | G Blancaneaux | 3 | 6$^7$ | | 2 | H Gaston | 6 | 7 | | | | | | | | | | |
| 2 | H Gaston | 6 | 7$^9$ | | | | | | | | | | | | | | | |