2023 Upper Austria Open – Singles
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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
- Austria Dominic Thiem (semifinals)
- France Hugo Gaston (quarterfinals)
- Argentina Facundo Bagnis (quarterfinals)
- Netherlands Gijs Brouwer (first round)
- Austria Filip Misolic (final)
- Austria Sebastian Ofner (semifinals)
- Switzerland Leandro Riedi (second round, retired)
- Austria Dennis Novak (quarterfinals)
Draw
Key
- Q = Qualifier
- WC = Wild card
- LL = Lucky loser
- Alt = Alternate
- ITF = ITF entry
- PR = Protected ranking
- SR = Special ranking
- SE = Special exempt
- JE = Junior exempt
- JR = Junior Accelerator Programme entrant
- CO = College Accelerator Programme entrant
- NG = Next Gen Accelerator Program entrant
- w/o = Walkover
- r = Retired
- d = Defaulted
Finals
| Semifinals | Final | ||||||||||||
| 1 | Austria Dominic Thiem | 63 | 2 | ||||||||||
| Serbia Hamad Međedović | 77 | 6 | |||||||||||
| Serbia Hamad Međedović | 6 | 65 | 6 | ||||||||||
| 5 | Austria Filip Misolic | 2 | 77 | 4 | |||||||||
| 5 | Austria Filip Misolic | 77 | 6 | ||||||||||
| 6 | Austria Sebastian Ofner | 61 | 4 |
Top half
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | Austria D Thiem | 6 | 6 | ||||||||||||||||||||||||
| Q | Austria Matthias Ujvary | 4 | 2 | 1 | Austria D Thiem | 6 | 6 | ||||||||||||||||||||
| Argentina F Delbonis | 6 | 66 | 6 | Argentina F Delbonis | 1 | 4 | |||||||||||||||||||||
| Alt | France M Guinard | 2 | 78 | 2 | 1 | Austria D Thiem | 6 | 6 | |||||||||||||||||||
| Croatia D Prižmić | 6 | 65 | 6 | Croatia D Prižmić | 3 | 3 | |||||||||||||||||||||
| Serbia M Zekić | 3 | 77 | 3 | Croatia D Prižmić | 7 | 4 | |||||||||||||||||||||
| Bulgaria A Andreev | 77 | 4 | 66 | 7 | Switzerland L Riedi | 5 | 0r | ||||||||||||||||||||
| 7 | Switzerland L Riedi | 65 | 6 | 78 | 1 | Austria D Thiem | 63 | 2 | |||||||||||||||||||
| 4 | Netherlands G Brouwer | 4 | 6 | 3 | Serbia H Međedović | 77 | 6 | ||||||||||||||||||||
| Switzerland A Ritschard | 6 | 3 | 6 | Switzerland A Ritschard | 3 | 1 | |||||||||||||||||||||
| Q | Germany Lucas Gerch | 1 | 3 | Serbia H Međedović | 6 | 6 | |||||||||||||||||||||
| Serbia H Međedović | 6 | 6 | Serbia H Međedović | 7 | 6 | ||||||||||||||||||||||
| WC | Austria Sandro Kopp | 1 | 2 | 8 | Austria D Novak | 5 | 3 | ||||||||||||||||||||
| Alt | Bulgaria A Lazarov | 6 | 3r | WC | Austria S Kopp | 5 | 6 | 3 | |||||||||||||||||||
| France H Mayot | 6 | 3 | 2 | 8 | Austria D Novak | 7 | 3 | 6 | |||||||||||||||||||
| 8 | Austria D Novak | 2 | 6 | 6 |
Bottom half
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | Austria F Misolic | 4 | 6 | 6 | |||||||||||||||||||||||
| France G Mpetshi Perricard | 6 | 3 | 2 | 5 | Austria F Misolic | 7 | 6 | ||||||||||||||||||||
| Q | Romania M Copil | 65 | 6 | 6 | Q | Romania M Copil | 5 | 3 | |||||||||||||||||||
| Q | Germany H Jebens | 77 | 3 | 4 | 5 | Austria F Misolic | 3 | 6 | 6 | ||||||||||||||||||
| WC | Austria G Melzer | 77 | 1 | 6 | 3 | Argentina F Bagnis | 6 | 4 | 1 | ||||||||||||||||||
| Alt | Australia J McCabe | 61 | 6 | 0 | WC | Austria G Melzer | 4 | 6 | 3 | ||||||||||||||||||
| Austria M Neuchrist | 1 | 1 | 3 | Argentina F Bagnis | 6 | 4 | 6 | ||||||||||||||||||||
| 3 | Argentina F Bagnis | 6 | 6 | 5 | Austria F Misolic | 77 | 6 | ||||||||||||||||||||
| 6 | Austria S Ofner | 62 | 6 | 7 | 6 | Austria S Ofner | 61 | 4 | |||||||||||||||||||
| Alt | Germany L Wessels | 77 | 4 | 5 | 6 | Austria S Ofner | 6 | 77 | |||||||||||||||||||
| Q | Switzerland D Wenger | 6 | 5 | 6 | Q | Switzerland D Wenger | 2 | 60 | |||||||||||||||||||
| Q | Bosnia and Herzegovina M Bašić | 4 | 7 | 3 | 6 | Austria S Ofner | 3 | 6 | 77 | ||||||||||||||||||
| WC | Austria L Neumayer | 4 | 6 | 3 | 2 | France H Gaston | 6 | 3 | 64 | ||||||||||||||||||
| Australia D Sweeny | 6 | 1 | 6 | Australia D Sweeny | 4 | 5 | |||||||||||||||||||||
| France G Blancaneaux | 3 | 67 | 2 | France H Gaston | 6 | 7 | |||||||||||||||||||||
| 2 | France H Gaston | 6 | 79 |