# 2023 Dutch Open – Singles

Tallon Griekspoor was the defending champion but chose not to defend his title.
Maximilian Marterer won the title after defeating Titouan Droguet 6–4, 6–2 in the final.

## Seeds

* Facundo Díaz Acosta (quarterfinals, retired)
* Felipe Meligeni Alves (first round)
* Jan Choinski (second round)
* Jelle Sels (first round)
* Maximilian Marterer (champion)
* Jesper de Jong (first round)
* Nicholas David Ionel (second round)
* Titouan Droguet (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 | Final | Final | Final | Final |
| Q | Mathys Erhard | 5 | 1 | | | | |
| 8 | Titouan Droguet | 7 | 6 | | | | |
| 8 | Titouan Droguet | 7 | 6 | 8 | Titouan Droguet | 4 | 2 |
| | | | | 5 | Maximilian Marterer | 6 | 6 |
| | Rudolf Molleker | 4 | 6$^5$ | 5 | Maximilian Marterer | 6 | 6 |
| 5 | Maximilian Marterer | 6 | 7$^7$ | | | | |

### Top half

| 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 | F Díaz Acosta | 6 | 6 | | | | | | | | | | | | | | |
| | U Blanchet | 1 | 2 | 1 | F Díaz Acosta | 6 | 4 | 6 | | | | | | | | | |
| | S Travaglia | 6 | 6 | | S Travaglia | 3 | 6 | 4 | | | | | | | | | |
| LL | Luca Potenza | 2 | 3 | | | | | | 1 | F Díaz Acosta | 3 | 0$^r$ | | | | | |
| Q | T Colson | 6$^6$ | 6$^3$ | | | | | | Q | M Erhard | 6 | 0 | | | | | |
| Q | Mathys Erhard | 7$^8$ | 7$^7$ | Q | M Erhard | 6 | 6 | | | | | | | | | | |
| | M Houkes | 6$^4$ | 2 | 7 | ND Ionel | 2 | 3 | | | | | | | | | | |
| 7 | ND Ionel | 7$^7$ | 6 | | | | | | | | | | | Q | M Erhard | 5 | 1 |
| 3 | J Choinski | 6 | 7 | | | | | | | | | | | 8 | T Droguet | 7 | 6 |
| | S Rodríguez Taverna | 4 | 5 | 3 | J Choinski | 2 | 6$^5$ | | | | | | | | | | |
| | M Landaluce | 6$^4$ | 5 | WC | A Deckers | 6 | 7$^7$ | | | | | | | | | | |
| WC | Alec Deckers | 7$^7$ | 7 | | | | | | WC | A Deckers | 3 | 6 | 3 | | | | |
| Q | Niels Visker | 2 | 1 | | | | | | 8 | T Droguet | 6 | 4 | 6 | | | | |
| Q | E Møller | 6 | 6 | Q | E Møller | 3 | 4 | | | | | | | | | | |
| Q | M Vrbenský | 1 | 4 | 8 | T Droguet | 6 | 6 | | | | | | | | | | |
| 8 | T Droguet | 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 |
| 6 | J de Jong | 4 | 6 | 3 | | | | | | | | | | | | | |
| WC | G den Ouden | 6 | 3 | 6 | WC | G den Ouden | 6$^6$ | 6$^6$ | | | | | | | | | |
| | G Onclin | 6 | 6 | | | G Onclin | 7$^8$ | 7$^8$ | | | | | | | | | |
| | O Roca Batalla | 2 | 2 | | | | | | | | G Onclin | 2 | 2 | | | | |
| | R Molleker | 6 | 7$^7$ | | | | | | | | R Molleker | 6 | 6 | | | | |
| WC | Sander Jong | 4 | 6$^3$ | | | R Molleker | 6 | 6 | | | | | | | | | |
| | F Delbonis | 7$^7$ | 6 | | | F Delbonis | 1 | 3 | | | | | | | | | |
| 4 | J Sels | 6$^2$ | 2 | | | | | | | | | | | | R Molleker | 4 | 6$^5$ |
| 5 | M Marterer | 6 | 6 | | | | | | | | | | | 5 | M Marterer | 6 | 7$^7$ |
| | S Diez | 3 | 4 | | 5 | M Marterer | 6 | 7$^7$ | | | | | | | | | |
| Alt | M Guinard | 2 | 2 | | | J Menšík | 3 | 6$^3$ | | | | | | | | | |
| | J Menšík | 6 | 6 | | | | | | | 5 | M Marterer | 6 | 6 | | | | |
| Q | J De Loore | 6 | 6 | | | | | | | | M Geerts | 1 | 2 | | | | |
| LL | Àlex Martí Pujolràs | 3 | 3 | | Q | J De Loore | 6$^2$ | 7$^7$ | 4 | | | | | | | | |
| | M Geerts | 3 | 6 | 6 | | M Geerts | 7$^7$ | 6$^4$ | 6 | | | | | | | | |
| 2 | F Meligeni Alves | 6 | 2 | 2 | | | | | | | | | | | | | |