# 2023 BMW Open – Singles

Defending champion Holger Rune defeated Botic van de Zandschulp in a rematch of the previous year's final, 6–4, 1–6, 7–6$^{(7–3)}$ to win the singles tennis title at the 2023 Bavarian International Tennis Championships. In the third set of the final, Rune recovered from being a double-break down and saved four championship points en route to victory.

## Seeds

The top four seeds received a bye into the second round.
* Holger Rune (champion)
* Taylor Fritz (semifinals)
* Alexander Zverev (second round)
* Botic van de Zandschulp (final)
* Sebastián Báez (first round)
* Lorenzo Sonego (second round)
* Roberto Carballés Baena (first round)
* Marc-Andrea Hüsler (second 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 | Final |
| 1 | Holger Rune | 6 | 6 | | | | | |
| | Christopher O'Connell | 3 | 2 | | | | | |
| | Christopher O'Connell | 3 | 2 | 1 | Holger Rune | 6 | 1 | 7$^7$ |
| | | | | 4 | Botic van de Zandschulp | 4 | 6 | 6$^3$ |
| 4 | Botic van de Zandschulp | 6 | 7$^7$ | 4 | Botic van de Zandschulp | 4 | 6 | 6$^3$ |
| 2 | Taylor Fritz | 4 | 6$^2$ | | | | | |

### 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 | H Rune | 6 | 6 | | | | | | | | | | |
| | T Monteiro | 7$^7$ | 6$^5$ | 2 | WC | Y Hanfmann | 3 | 4 | | | | | | | | | | |
| WC | Y Hanfmann | 6$^3$ | 7$^7$ | 6 | | | | | | 1 | H Rune | 6 | 6 | | | | | |
| | C Garín | 6 | 6 | | | | | | | | C Garín | 2 | 4 | | | | | |
| Q | M Topo | 4 | 2 | | | C Garín | 6 | 7$^7$ | | | | | | | | | | |
| | Q Halys | 6 | 6$^5$ | 5 | 6 | L Sonego | 3 | 6$^3$ | | | | | | | | | | |
| 6 | L Sonego | 3 | 7$^7$ | 7 | | | | | | | | | | | 1 | H Rune | 6 | 6 |
| | | | | | | | | | | | | | | | | C O'Connell | 3 | 2 |
| | | | | | 3 | A Zverev | 6$^2$ | 4 | | | | | | | | | | |
| | C O'Connell | 6 | 6 | | | C O'Connell | 7$^7$ | 6 | | | | | | | | | | |
| | U Humbert | 4 | 4 | | | | | | | | C O'Connell | 7$^7$ | 4 | 6 | | | | |
| Q | F Cobolli | 7 | 6 | | | | | | | Q | F Cobolli | 6$^5$ | 6 | 3 | | | | |
| | J Thompson | 5 | 1 | | Q | F Cobolli | 6 | 3 | 6 | | | | | | | | | |
| | O Otte | 6 | 7 | | | O Otte | 0 | 6 | 3 | | | | | | | | | |
| 5 | S Báez | 3 | 5 | | | | | | | | | | | | | | | |

### 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 |
| 7 | R Carballés Baena | 1 | 7 | 2 | | | | | | | | | | | | | |
| | M Giron | 6 | 5 | 6 | | M Giron | 4 | 6 | 6 | | | | | | | | |
| Q | A Ritschard | 7 | 7 | | Q | A Ritschard | 6 | 3 | 3 | | | | | | | | |
| | J-L Struff | 5 | 5 | | | | | | | | M Giron | 6$^5$ | 3 | | | | |
| Q | A Karatsev | 4 | 7$^7$ | 6 | | | | | | 4 | B van de Zandschulp | 7$^7$ | 6 | | | | |
| WC | D Altmaier | 6 | 6$^2$ | 2 | Q | A Karatsev | 2 | 0 | | | | | | | | | |
| | | | | | 4 | B van de Zandschulp | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | 4 | B van de Zandschulp | 6 | 7$^7$ |
| 8 | M-A Hüsler | 7$^7$ | 4 | 6 | | | | | | | | | | 2 | T Fritz | 4 | 6$^2$ |
| PR | K Edmund | 6$^3$ | 6 | 3 | 8 | M-A Hüsler | 7 | 4 | 4 | | | | | | | | |
| | D Thiem | 6 | 0 | | | D Thiem | 5 | 6 | 6 | | | | | | | | |
| | C Lestienne | 3 | 0$^r$ | | | | | | | | D Thiem | 3 | 4 | | | | |
| | M Fucsovics | 4 | 7$^8$ | 6 | | | | | | 2 | T Fritz | 6 | 6 | | | | |
| WC | MH Rehberg | 6 | 6$^6$ | 3 | | M Fucsovics | 6 | 3 | 3 | | | | | | | | |
| | | | | | 2 | T Fritz | 4 | 6 | 6 | | | | | | | | |

## Qualifying
### Seeds

* Aslan Karatsev (qualified)
* Vít Kopřiva (qualifying competition)
* Riccardo Bonadio (qualifying competition, withdrew)
* Zdeněk Kolář (qualifying competition)
* Flavio Cobolli (qualified)
* Alexander Ritschard (qualified)
* Shintaro Mochizuki (first round)
* Daniel Masur (first round)

### Qualifiers

* Aslan Karatsev
* Marko Topo
* Alexander Ritschard
* Flavio Cobolli

### Draw
#### First qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Aslan Karatsev | 6 | 3 | 6 | | | | |
| | Robin Haase | 2 | 6 | 0 | | | | |
| | Robin Haase | 2 | 6 | 0 | 1 | Aslan Karatsev | 6 | 6 |
| | | | | | | Louis Wessels | 2 | 2 |
| | Louis Wessels | 6 | 3 | 6 | | Louis Wessels | 2 | 2 |
| 8 | Daniel Masur | 3 | 6 | 3 | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Vít Kopřiva | 6$^3$ | 6 | 7$^7$ | | | | | |
| | Álvaro López San Martín | 7$^7$ | 3 | 6$^3$ | | | | | |
| | Álvaro López San Martín | 7$^7$ | 3 | 6$^3$ | 2 | Vít Kopřiva | 4 | 6 | 3 |
| | | | | | WC | Marko Topo | 6 | 4 | 6 |
| WC | Marko Topo | 6 | 6 | | WC | Marko Topo | 6 | 4 | 6 |
| 7 | Shintaro Mochizuki | 3 | 4 | | | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Riccardo Bonadio | 5 | 6 | 6 | | | |
| WC | Philip Florig | 7 | 3 | 3 | | | |
| WC | Philip Florig | 7 | 3 | 3 | 3 | Riccardo Bonadio | |
| | | | | | 6 | Alexander Ritschard | w/o |
| | Alexey Vatutin | 7 | 4 | 5 | 6 | Alexander Ritschard | w/o |
| 6 | Alexander Ritschard | 5 | 6 | 7 | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Zdeněk Kolář | 6 | 6$^5$ | 6 | | | | |
| | Viktor Durasovic | 4 | 7$^7$ | 3 | | | | |
| | Viktor Durasovic | 4 | 7$^7$ | 3 | 4 | Zdeněk Kolář | 2 | 2 |
| | | | | | 5 | Flavio Cobolli | 6 | 6 |
| | Lukáš Rosol | 1 | 2 | | 5 | Flavio Cobolli | 6 | 6 |
| 5 | Flavio Cobolli | 6 | 6 | | | | | |