# 2023 UniCredit Czech Open – Singles

Vít Kopřiva was the defending champion but lost in the first round to Máté Valkusz.
Dalibor Svrčina won the title after defeating Tomáš Macháč 6–4, 6–2 in the final.

## Seeds

* Jiří Lehečka (quarterfinals)
* Federico Coria (first round)
* Facundo Bagnis (second round)
* Zsombor Piros (second round)
* Tomáš Macháč (final)
* Lukáš Klein (semifinals)
* Elias Ymer (second round, retired)
* Flavio Cobolli (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 | Semifinals | Final | Final | Final | Final |
| 6 | Lukáš Klein | 3 | 6 | 4 | | | | |
| Alt | Dalibor Svrčina | 6 | 4 | 6 | | | | |
| Alt | Dalibor Svrčina | 6 | 4 | 6 | Alt | Dalibor Svrčina | 6 | 6 |
| | | | | | 5 | Tomáš Macháč | 4 | 2 |
| SE | Francisco Comesaña | 4 | 3 | | 5 | Tomáš Macháč | 4 | 2 |
| 5 | Tomáš Macháč | 6 | 6 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1/WC | J Lehečka | 6 | 6 | | | | | | | | | | | | | | |
| | N Hardt | 3 | 4 | | 1/WC | J Lehečka | 7$^7$ | 6 | | | | | | | | | |
| | J Sels | 6 | 6$^2$ | 6 | | J Sels | 6$^3$ | 3 | | | | | | | | | |
| | M Navone | 3 | 7$^7$ | 3 | | | | | 1/WC | J Lehečka | 3 | 4 | | | | | |
| | Em Nava | 7$^7$ | 6 | | | | | | 6 | L Klein | 6 | 6 | | | | | |
| | Z Kolář | 6$^2$ | 1 | | | Em Nava | 3 | 2 | | | | | | | | | |
| Q | M Pucinelli de Almeida | 4 | 6 | 4 | 6 | L Klein | 6 | 6 | | | | | | | | | |
| 6 | L Klein | 6 | 3 | 6 | | | | | | | | | 6 | L Klein | 3 | 6 | 4 |
| 3 | F Bagnis | 6 | 7 | | | | | | | | | | Alt | D Svrčina | 6 | 4 | 6 |
| | M Geerts | 1 | 5 | | 3 | F Bagnis | 2 | 3 | | | | | | | | | |
| | ND Ionel | 2 | 3 | | WC | J Menšík | 6 | 6 | | | | | | | | | |
| WC | J Menšík | 6 | 6 | | | | | | WC | J Menšík | 6$^2$ | 1 | | | | | |
| | L Darderi | 7 | 4 | 0 | | | | | Alt | D Svrčina | 7$^7$ | 6 | | | | | |
| Alt | D Svrčina | 5 | 6 | 6 | Alt | D Svrčina | 4 | | | | | | | | | | |
| | D Novak | 4 | 6 | 2 | 7 | E Ymer | 1$^r$ | | | | | | | | | | |
| 7 | E Ymer | 6 | 2 | 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 |
| 8 | F Cobolli | 4 | 4 | | | | | | | | | | | | | | |
| Q | Hynek Bartoň | 6 | 6 | | Q | H Bartoň | 6 | 3 | 1 | | | | | | | | |
| WC | Lukáš Pokorný | 1 | 0 | | | D Kuzmanov | 2 | 6 | 6 | | | | | | | | |
| | D Kuzmanov | 6 | 6 | | | | | | | | D Kuzmanov | 4 | 4 | | | | |
| SE | F Comesaña | 6 | 6 | | | | | | | SE | F Comesaña | 6 | 6 | | | | |
| Q | Edoardo Lavagno | 3 | 3 | | SE | F Comesaña | 7$^{10}$ | 4 | 6 | | | | | | | | |
| Q | G Mpetshi Perricard | 5 | 4 | | 4 | Z Piros | 6$^8$ | 6 | 0 | | | | | | | | |
| 4 | Z Piros | 7 | 6 | | | | | | | | | | | SE | F Comesaña | 4 | 3 |
| 5 | T Macháč | 6 | 6 | | | | | | | | | | | 5 | T Macháč | 6 | 6 |
| | F Ferreira Silva | 2 | 2 | | 5 | T Macháč | 6 | 6 | | | | | | | | | |
| | V Kopřiva | 3 | 6 | 3 | Q | M Valkusz | 2 | 0 | | | | | | | | | |
| Q | M Valkusz | 6 | 4 | 6 | | | | | | 5 | T Macháč | 7 | 6 | | | | |
| Q | RA Burruchaga | 4 | 6 | 6 | | | | | | Q | RA Burruchaga | 5 | 2 | | | | |
| | A Collarini | 6 | 4 | 3 | Q | RA Burruchaga | 6 | 6 | | | | | | | | | |
| | H Mayot | 6 | 6 | | | H Mayot | 4 | 4 | | | | | | | | | |
| 2 | F Coria | 1 | 2 | | | | | | | | | | | | | | |