# 2023 Sparta Prague Open – Singles

Sebastian Ofner was the defending champion but chose not to defend his title.
Jakub Menšík won the title after defeating Dominik Koepfer 6–4, 6–3 in the final.

## Seeds

* Radu Albot (first round)
* Dominic Stricker (first round)
* Norbert Gombos (second round)
* Lukáš Klein (quarterfinals)
* Enzo Couacaud (first round)
* Dominik Koepfer (final)
* Damir Džumhur (first round)
* Tseng Chun-hsin (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 |
| WC | Jakub Menšík | 6 | 7 | | | | |
| Alt | Alejandro Moro Cañas | 2 | 5 | | | | |
| Alt | Alejandro Moro Cañas | 2 | 5 | WC | Jakub Menšík | 6 | 6 |
| | | | | 6 | Dominik Koepfer | 4 | 3 |
| 6 | Dominik Koepfer | 6 | 6 | 6 | Dominik Koepfer | 4 | 3 |
| | Nicolás Kicker | 4 | 3 | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | R Albot | 6$^4$ | 6 | 3 | | | | | | | | | | | | | | |
| WC | J Menšík | 7$^7$ | 4 | 6 | WC | J Menšík | 6 | 6 | | | | | | | | | | |
| | M Geerts | 1 | 1 | | LL | V Sachko | 4 | 4 | | | | | | | | | | |
| LL | V Sachko | 6 | 6 | | | | | | | WC | J Menšík | 3 | 6 | 7$^8$ | | | | |
| Alt | F Gaio | 2 | 4 | | | | | | | Q | A Santillan | 6 | 3 | 6$^6$ | | | | |
| | N Hardt | 6 | 6 | | | N Hardt | 6 | 4 | 3 | | | | | | | | | |
| Q | A Santillan | 6 | 6 | | Q | A Santillan | 4 | 6 | 6 | | | | | | | | | |
| 8 | C-h Tseng | 3 | 0 | | | | | | | | | | | | WC | J Menšík | 6 | 7 |
| 3 | N Gombos | 6 | 6 | | | | | | | | | | | | Alt | A Moro Cañas | 2 | 5 |
| Q | R Molleker | 4 | 4 | | 3 | N Gombos | 6$^8$ | 6$^2$ | | | | | | | | | | |
| | S Mochizuki | 7 | 6 | | | S Mochizuki | 7$^{10}$ | 7$^7$ | | | | | | | | | | |
| WC | M Vrbenský | 5 | 3 | | | | | | | | S Mochizuki | 3 | 4 | | | | | |
| Alt | A Moro Cañas | 6 | 3 | 6 | | | | | | Alt | A Moro Cañas | 6 | 6 | | | | | |
| Q | B Harris | 2 | 6 | 0 | Alt | A Moro Cañas | 6 | 2 | 6 | | | | | | | | | |
| | Z Svajda | 6 | 6 | | | Z Svajda | 4 | 6 | 4 | | | | | | | | | |
| 5 | E Couacaud | 4 | 1 | | | | | | | | | | | | | | | |

### 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 |
| 6 | D Koepfer | 1 | | | | | | | | | | | | | | | | |
| Q | G Elias | 1$^r$ | | | 6 | D Koepfer | 7$^8$ | 0 | | | | | | | | | | |
| | Z Kolář | 4 | 3 | | | E Furness | 6$^6$ | 0$^r$ | | | | | | | | | | |
| | E Furness | 6 | 6 | | | | | | | 6 | D Koepfer | 6 | 6$^6$ | 6 | | | | |
| Q | G Andreozzi | 6 | 6 | | | | | | | 4 | L Klein | 4 | 7$^8$ | 1 | | | | |
| Q | D Rincón | 4 | 4 | | Q | G Andreozzi | 7 | 3 | 3 | | | | | | | | | |
| | Y Demin | 5 | 1 | | 4 | L Klein | 5 | 6 | 6 | | | | | | | | | |
| 4 | L Klein | 7 | 6 | | | | | | | | | | | | 6 | D Koepfer | 6 | 6 |
| 7 | D Džumhur | 3 | 6$^3$ | | | | | | | | | | | | | N Kicker | 4 | 3 |
| | N Kicker | 6 | 7$^7$ | | | N Kicker | 7 | 6 | | | | | | | | | | |
| | D Added | 7 | 4 | 3 | Alt | N Fatić | 5 | 4 | | | | | | | | | | |
| Alt | N Fatić | 5 | 6 | 6 | | | | | | | N Kicker | w/o | | | | | | |
| WC | J Veselý | 4 | 5 | | | | | | | | H Laaksonen | | | | | | | |
| | P Llamas Ruiz | 6 | 7 | | | P Llamas Ruiz | 3 | 7$^8$ | 2 | | | | | | | | | |
| | H Laaksonen | 7 | 4 | 6 | | H Laaksonen | 6 | 6$^6$ | 6 | | | | | | | | | |
| 2 | D Stricker | 5 | 6 | 1 | | | | | | | | | | | | | | |