# 2023 Schwaben Open – Singles

Yannick Hanfmann was the defending champion but chose not to defend his title.
Carlos Taberner won the title after defeating Oriol Roca Batalla 6–4, 6–4 in the final.

## Seeds

* Hernán Casanova (first round, retired)
* Benjamin Hassan (quarterfinals, retired)
* Román Andrés Burruchaga (first round)
* Steven Diez (second round)
* Manuel Guinard (first round, retired)
* Santiago Rodríguez Taverna (first round)
* Timo Stodder (semifinals)
* Nikolás Sánchez Izquierdo (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 |
| Q | Nicolas Zanellato | 3 | 4 | | | |
| | Oriol Roca Batalla | 6 | 6 | | | |
| | Oriol Roca Batalla | 6 | 6 | Oriol Roca Batalla | 4 | 4 |
| | | | | Carlos Taberner | 6 | 6 |
| | Carlos Taberner | 6 | 6 | Carlos Taberner | 6 | 6 |
| 7 | Timo Stodder | 3 | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | H Casanova | 4$^r$ | | | | | | | | | | | | | | | |
| | Lucas Gerch | 5 | | | | L Gerch | 3 | 4 | | | | | | | | | |
| LL | H Rocha | 1 | 1 | | | M Echargui | 6 | 6 | | | | | | | | | |
| | M Echargui | 6 | 6 | | | | | | | | M Echargui | 5 | 1 | | | | |
| | Elmar Ejupovic | 6 | 4 | 2 | | | | | | Q | N Zanellato | 7 | 6 | | | | |
| Q | Nicolas Zanellato | 3 | 6 | 6 | Q | N Zanellato | 3 | 7 | 6 | | | | | | | | |
| WC | M Möller | 2 | 6 | 6 | WC | M Möller | 6 | 5 | 4 | | | | | | | | |
| 8 | N Sánchez Izquierdo | 6 | 2 | 0 | | | | | | | | | | Q | N Zanellato | 3 | 4 |
| 4 | S Diez | 6 | 6$^8$ | 6 | | | | | | | | | | | O Roca Batalla | 6 | 6 |
| Q | D Pichler | 3 | 7$^{10}$ | 1 | 4 | S Diez | 1 | 4 | | | | | | | | | |
| Q | C Negritu | 2 | 7$^8$ | 3 | | O Roca Batalla | 6 | 6 | | | | | | | | | |
| | O Roca Batalla | 6 | 6$^6$ | 6 | | | | | | | O Roca Batalla | 6 | 6 | | | | |
| | Alexander Weis | 2 | 7 | 4 | | | | | | | N Serdarušić | 4 | 4 | | | | |
| | M Martineau | 6 | 5 | 6 | | M Martineau | 3 | 6 | 4 | | | | | | | | |
| | N Serdarušić | 6 | 1 | | | N Serdarušić | 6 | 4 | 6 | | | | | | | | |
| 5 | M Guinard | 1 | 0$^r$ | | | | | | | | | | | | | | |

### 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 | S Rodríguez Taverna | 5 | 6$^2$ | | | | | | | | | | | | | | | |
| | L Wessels | 7 | 7$^7$ | | | L Wessels | 2 | 4 | | | | | | | | | | |
| Q | G Ferrari | 6$^1$ | 6 | 6 | Q | G Ferrari | 6 | 6 | | | | | | | | | | |
| | B Harris | 7$^7$ | 1 | 4 | | | | | | Q | G Ferrari | 4 | 1 | | | | | |
| | O Crawford | 6 | 6 | | | | | | | | C Taberner | 6 | 6 | | | | | |
| | G Fonio | 2 | 3 | | | O Crawford | 6 | 4 | 6$^3$ | | | | | | | | | |
| | C Taberner | 6 | 6 | | | C Taberner | 3 | 6 | 7$^7$ | | | | | | | | | |
| 3 | RA Burruchaga | 1 | 4 | | | | | | | | | | | | | C Taberner | 6 | 6 |
| 7 | Timo Stodder | 7 | 6 | | | | | | | | | | | | 7 | T Stodder | 3 | 3 |
| | M Houkes | 5 | 1 | | 7 | T Stodder | 6 | 6 | | | | | | | | | | |
| Q | H Habib | 6$^4$ | 6 | 6$^2$ | | A Martin | 1 | 1 | | | | | | | | | | |
| | A Martin | 7$^7$ | 3 | 7$^7$ | | | | | | 7 | T Stodder | 4 | 7$^7$ | 5 | | | | |
| | G-A Bailly | 6 | 6 | | | | | | | 2 | B Hassan | 6 | 6$^4$ | 3$^r$ | | | | |
| WC | M Topo | 1 | 2 | | | G-A Bailly | 4 | 4 | | | | | | | | | | |
| Q | D Masur | 2 | 6$^4$ | | 2 | B Hassan | 6 | 6 | | | | | | | | | | |
| 2 | B Hassan | 6 | 7$^7$ | | | | | | | | | | | | | | | |