# 2023 Platzmann-Sauerland Open – Singles

Hamad Medjedovic was the defending champion but chose not to defend his title.
Duje Ajduković won the title after defeating Hugo Dellien 7–5, 6–4 in the final.

## Seeds

* Fábián Marozsán (second round)
* Pedro Martínez (quarterfinals)
* Benoît Paire (semifinals)
* Timofey Skatov (second round)
* Maximilian Marterer (first round)
* Raúl Brancaccio (semifinals, retired)
* Jan Choinski (first round)
* Hugo Dellien (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 |
| Q | Duje Ajduković | 6 | 2 | | | | | |
| 6 | Raúl Brancaccio | 3 | 1$^r$ | | | | | |
| 6 | Raúl Brancaccio | 3 | 1$^r$ | | Q | Duje Ajduković | 7 | 6 |
| | | | | | 8 | Hugo Dellien | 5 | 4 |
| 3 | Benoît Paire | 7$^7$ | 4 | 3 | 8 | Hugo Dellien | 5 | 4 |
| 8 | Hugo Dellien | 6$^4$ | 6 | 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 |
| 1 | F Marozsán | 7$^7$ | 6 | | | | | | | | | | | | | | | |
| WC | Liam Gavrielides | 6$^4$ | 3 | | 1 | F Marozsán | 6 | 6$^3$ | 2 | | | | | | | | | |
| WC | MH Rehberg | 4 | 2 | | | R Molleker | 0 | 7$^7$ | 6 | | | | | | | | | |
| | R Molleker | 6 | 6 | | | | | | | | R Molleker | 2 | 4 | | | | | |
| | O Roca Batalla | 6 | 6 | | | | | | | Q | D Ajduković | 6 | 6 | | | | | |
| Q | Tommaso Compagnucci | 3 | 4 | | | O Roca Batalla | 4 | 4 | | | | | | | | | | |
| Q | D Ajduković | 6 | 1 | 7$^7$ | Q | D Ajduković | 6 | 6 | | | | | | | | | | |
| 5 | M Marterer | 3 | 6 | 6$^5$ | | | | | | | | | | | Q | D Ajduković | 6 | 2 |
| 4 | T Skatov | 6 | 6$^5$ | 7 | | | | | | | | | | | 6 | R Brancaccio | 3 | 1$^r$ |
| | O Krutykh | 3 | 7$^7$ | 5 | 4 | T Skatov | 3 | 7 | 6$^5$ | | | | | | | | | |
| | G Blancaneaux | 4 | 1 | | | C Ugo Carabelli | 6 | 5 | 7$^7$ | | | | | | | | | |
| | C Ugo Carabelli | 6 | 6 | | | | | | | | C Ugo Carabelli | 4 | 6 | 4 | | | | |
| | S Travaglia | 6$^3$ | 0$^r$ | | | | | | | 6 | R Brancaccio | 6 | 3 | 6 | | | | |
| Alt | H Squire | 7$^7$ | 1 | | Alt | H Squire | 3 | 6 | 4 | | | | | | | | | |
| | H Laaksonen | 4 | 6 | 6$^3$ | 6 | R Brancaccio | 6 | 2 | 6 | | | | | | | | | |
| 6 | R Brancaccio | 6 | 3 | 7$^7$ | | | | | | | | | | | | | | |

### 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 |
| 7 | J Choinski | 4 | 2 | | | | | | | | | | | | | | | |
| | G Onclin | 6 | 6 | | | G Onclin | 6 | 6 | | | | | | | | | | |
| | S Rodríguez Taverna | 6 | 6 | | | S Rodríguez Taverna | 1 | 4 | | | | | | | | | | |
| Q | Georgii Kravchenko | 3 | 2 | | | | | | | | G Onclin | 4 | 4 | | | | | |
| Q | M Möller | 6 | 6 | | | | | | | 3 | B Paire | 6 | 6 | | | | | |
| | N Hardt | 3 | 1 | | Q | M Möller | 4 | 4 | | | | | | | | | | |
| | F Mena | 4 | 3 | | 3 | B Paire | 6 | 6 | | | | | | | | | | |
| 3 | B Paire | 6 | 6 | | | | | | | | | | | 3 | B Paire | 7$^7$ | 4 | 3 |
| 8 | H Dellien | 6 | 6 | | | | | | | | | | | 8 | H Dellien | 6$^4$ | 6 | 6 |
| | D Masur | 2 | 3 | | 8 | H Dellien | 1 | 6 | 7$^7$ | | | | | | | | | |
| | J Kovalík | 7$^9$ | 6 | | | J Kovalík | 6 | 1 | 6$^3$ | | | | | | | | | |
| Q | H Naw | 6$^7$ | 3 | | | | | | | 8 | H Dellien | 7 | 7 | | | | | |
| WC | L Wessels | 6 | 7$^9$ | | | | | | | 2 | P Martínez | 5 | 5 | | | | | |
| Q | M Zormann | 3 | 6$^7$ | | WC | L Wessels | 4 | 2 | | | | | | | | | | |
| | M Navone | 5 | 6 | 6$^2$ | 2 | P Martínez | 6 | 6 | | | | | | | | | | |
| 2 | P Martínez | 7 | 2 | 7$^7$ | | | | | | | | | | | | | | |