# 2023 Advantage Cars Prague Open – Men's singles

Pedro Cachin was the defending champion but chose not to defend his title.
Dominic Stricker won the title after defeating Sebastian Ofner 7–6$^{(9–7)}$, 6–3 in the final.

## Seeds

* Filip Krajinović (semifinals)
* Radu Albot (first round)
* Juan Manuel Cerúndolo (first round)
* Hugo Gaston (first round)
* Zsombor Piros (first round, retired)
* Tomáš Macháč (second round)
* Dominic Stricker (champion)
* Sebastian Ofner (final)

## 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 |
| 1 | Filip Krajinović | 5 | 7 | 3 | | | | |
| 7 | Dominic Stricker | 7 | 5 | 6 | | | | |
| 7 | Dominic Stricker | 7 | 5 | 6 | 7 | Dominic Stricker | 7$^9$ | 6 |
| | | | | | 8 | Sebastian Ofner | 6$^7$ | 3 |
| | Lukáš Klein | 6$^4$ | 6 | 3 | 8 | Sebastian Ofner | 6$^7$ | 3 |
| 8 | Sebastian Ofner | 7$^7$ | 0 | 6 | | | | |

### 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 | Semifinals |
| 1 | F Krajinović | 6 | 4 | 6 | | | | | | | | | | | | | | | |
| Q | J Choinski | 4 | 6 | 2 | 1 | F Krajinović | 6 | 4 | 6 | | | | | | | | | | |
| Q | F Gaio | 6 | 7$^7$ | | Q | F Gaio | 2 | 6 | 4 | | | | | | | | | | |
| Q | D Kuzmanov | 4 | 6$^5$ | | | | | | | 1 | F Krajinović | 6 | 6 | | | | | | |
| Q | F Delbonis | 1 | 4 | | | | | | | | D Koepfer | 1 | 2 | | | | | | |
| | D Koepfer | 6 | 6 | | | D Koepfer | 6 | 3 | 6 | | | | | | | | | | |
| | N Gombos | 2 | | | | N Gombos | 2 | 6 | 3 | | | | | | | | | | |
| 5 | Z Piros | 2$^r$ | | | | | | | | | | | | | 1 | F Krajinović | 5 | 7 | 3 |
| 3 | JM Cerúndolo | 3 | 1 | | | | | | | | | | | | 7 | D Stricker | 7 | 5 | 6 |
| WC | D Svrčina | 6 | 6 | | WC | D Svrčina | 6 | 3 | 6 | | | | | | | | | | |
| | R Peniston | 6 | 5 | 1 | WC | A Paulson | 1 | 6 | 0 | | | | | | | | | | |
| WC | A Paulson | 2 | 7 | 6 | | | | | | WC | D Svrčina | 6 | 1 | 3 | | | | | |
| Alt | F Meligeni Alves | 6 | 3 | | | | | | | 7 | D Stricker | 4 | 6 | 6 | | | | | |
| | P Martínez | 2 | 0$^r$ | | Alt | F Meligeni Alves | 7$^7$ | 2 | 4 | | | | | | | | | | |
| WC | K Ivanovski | 2 | 2 | | 7 | D Stricker | 6$^5$ | 6 | 6 | | | | | | | | | | |
| 7 | D Stricker | 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 | Semifinals |
| 6 | T Macháč | 6 | 6 | | | | | | | | | | | | | | | |
| Q | P Llamas Ruiz | 1 | 1 | | 6 | T Macháč | 5 | 3 | | | | | | | | | | |
| | A Bellier | 6 | 3 | 6$^5$ | SE | Z Kolář | 7 | 6 | | | | | | | | | | |
| SE | Z Kolář | 3 | 6 | 7$^7$ | | | | | | SE | Z Kolář | 3 | 5 | | | | | |
| | L Klein | 6 | 1 | 6 | | | | | | | L Klein | 6 | 7 | | | | | |
| SE | M Valkusz | 4 | 6 | 1 | | L Klein | 6 | 7$^8$ | | | | | | | | | | |
| | F Agamenone | 7 | 7 | | | F Agamenone | 3 | 6$^6$ | | | | | | | | | | |
| 4 | H Gaston | 5 | 5 | | | | | | | | | | | | L Klein | 6$^4$ | 6 | 3 |
| 8 | S Ofner | 6 | 6$^5$ | 6 | | | | | | | | | | 8 | S Ofner | 7$^7$ | 0 | 6 |
| | Y Demin | 4 | 7$^7$ | 1 | 8 | S Ofner | 6 | 6 | | | | | | | | | | |
| | J Sels | 2 | 7$^7$ | 1 | | C Ugo Carabelli | 4 | 2 | | | | | | | | | | |
| | C Ugo Carabelli | 6 | 6$^4$ | 6 | | | | | | 8 | S Ofner | 6 | 7 | | | | | |
| Q | V Sachko | 7 | 5 | 2 | | | | | | | T Barrios Vera | 2 | 5 | | | | | |
| | V Kopřiva | 5 | 7 | 6 | | V Kopřiva | 2 | 7 | 6$^7$ | | | | | | | | | |
| | T Barrios Vera | 6 | 6 | | | T Barrios Vera | 6 | 5 | 7$^9$ | | | | | | | | | |
| 2 | R Albot | 3 | 3 | | | | | | | | | | | | | | | |