# 1990 BMW Open – Singles

Andrei Chesnokov was the defending champion, but did not participate this year.
Karel Nováček won the title, defeating Thomas Muster 6–4, 6–2 in the final.

## Seeds

* Stefan Edberg (second round)
* Aaron Krickstein (second round)
* Michael Chang (first round)
* Jim Courier (quarterfinals)
* Carl-Uwe Steeb (second round)
* Pete Sampras (first round)
* Guillermo Pérez Roldán (first round)
* Horst Skoff (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 |
| Thomas Muster | 6 | 6 | | | | |
| Petr Korda | 3 | 1 | | | | |
| Petr Korda | 3 | 1 | | Thomas Muster | 4 | 2 |
| | | | | Karel Nováček | 6 | 6 |
| Jonas Svensson | 1 | 6 | 1 | Karel Nováček | 6 | 6 |
| Karel Nováček | 6 | 2 | 6 | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 1 | S Edberg | 6 | 6 | | | | | | | | | | | |
| | C van Rensburg | 1 | 0 | | 1 | S Edberg | 4 | 1 | | | | | | |
| | M Střelba | 6 | 6 | | | M Střelba | 6 | 6 | | | | | | |
| Q | S Pescosolido | 3 | 2 | | | | | | M Střelba | 3$^r$ | | | | |
| | T Witsken | 3 | 3 | | | | | | T Muster | 4 | | | | |
| | M Gustafsson | 6 | 6 | | | M Gustafsson | 5 | 2 | | | | | | |
| | T Muster | 6 | 6 | | | T Muster | 7 | 6 | | | | | | |
| 7 | G Pérez Roldán | 4 | 4 | | | | | | | | | T Muster | 6 | 6 |
| WC/3 | M Chang | 7 | 5 | 6 | | | | | | | | P Korda | 3 | 1 |
| | P Korda | 6 | 7 | 7 | | P Korda | 7 | 6 | | | | | | |
| Q | J Lozano | 3 | 6 | 4 | | K Curren | 5 | 1 | | | | | | |
| | K Curren | 6 | 4 | 6 | | | | | P Korda | 6 | 7 | | | |
| | Y Noah | 2 | 4 | | | | | | J Wöhrmann | 3 | 5 | | | |
| | J Wöhrmann | 6 | 6 | | | J Wöhrmann | 7 | 6 | | | | | | |
| | J Gunnarsson | 2 | 4 | | 6 | C-U Steeb | 5 | 4 | | | | | | |
| 5 | C-U Steeb | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | P Sampras | 0 | 1 | | | | | | | | | | | | | | | |
| | J Svensson | 6 | 6 | | | J Svensson | 6 | 1 | | | | | | | | | | |
| | M Šrejber | 7 | 6 | | | M Šrejber | 1 | 0$^r$ | | | | | | | | | | |
| | G Prpić | 6 | 3 | | | | | | | | J Svensson | 3 | 6 | 6 | | | | |
| | B Orešar | 7 | 6 | 6 | | | | | | 4 | J Courier | 6 | 3 | 4 | | | | |
| | M Stich | 6 | 7 | 4 | | B Orešar | 2 | 1 | | | | | | | | | | |
| | P Canè | 6 | 2 | | 4 | J Courier | 6 | 6 | | | | | | | | | | |
| 4 | J Courier | 7 | 6 | | | | | | | | | | | | J Svensson | 1 | 6 | 1 |
| 8 | H Skoff | 2 | 6 | 3 | | | | | | | | | | | K Nováček | 6 | 2 | 6 |
| Q | C Bergström | 6 | 4 | 6 | Q | C Bergström | 6 | 4 | 6 | | | | | | | | | |
| | P Lundgren | 4 | 7 | 3 | WC | U Riglewski | 1 | 6 | 0 | | | | | | | | | |
| WC | U Riglewski | 6 | 6 | 6 | | | | | | Q | C Bergström | 1 | 1 | | | | | |
| WC | H Schwaier | 3 | 4 | | | | | | | | K Nováček | 6 | 6 | | | | | |
| | K Nováček | 6 | 6 | | | K Nováček | 6 | 7 | | | | | | | | | | |
| Q | H de la Peña | 6 | 6 | 3 | 2 | A Krickstein | 2 | 6 | | | | | | | | | | |
| 2 | A Krickstein | 2 | 7 | 6 | | | | | | | | | | | | | | |