# 1990 CA-TennisTrophy – Singles

Paul Annacone was the defending champion but lost in the second round to Thomas Muster.
Anders Järryd won in the final 6–3, 6–3, 6–1 against Horst Skoff.

## Seeds

* Thomas Muster (semifinals)
* John McEnroe (quarterfinals)
* Martín Jaite (quarterfinals)
* Horst Skoff (final)
* Carl-Uwe Steeb (second round)
* Alexander Volkov (semifinals)
* Jimmy Arias (second round)
* Michael Stich (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

### Final

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Thomas Muster | 2 | 6 | | | | | |
| 4 | Horst Skoff | 6 | 7 | | | | | |
| 4 | Horst Skoff | 6 | 7 | 4 | Horst Skoff | 3 | 3 | 1 |
| | | | | | Anders Järryd | 6 | 6 | 6 |
| 6 | Alexander Volkov | 2 | 5 | | Anders Järryd | 6 | 6 | 6 |
| | Anders Järryd | 6 | 7 | | | | | |

### Section 1

| 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 | T Muster | 7 | 6 | | | | | | | | | | | | | | | |
| | M Střelba | 6 | 4 | | 1 | T Muster | 3 | 7 | 7 | | | | | | | | | |
| | P Annacone | 7 | 7 | | | P Annacone | 6 | 6 | 6 | | | | | | | | | |
| | J Tarango | 5 | 6 | | | | | | | 1 | T Muster | 0 | 6 | 7 | | | | |
| Q | A Olhovskiy | 6 | 6 | | | | | | | Q | A Olhovskiy | 6 | 4 | 6 | | | | |
| | O Delaître | 0 | 3 | | Q | A Olhovskiy | 7 | 6 | | | | | | | | | | |
| | J Bates | 5 | 4 | | 7 | J Arias | 5 | 4 | | | | | | | | | | |
| 7 | J Arias | 7 | 6 | | | | | | | | | | | | 1 | T Muster | 2 | 6 |
| 4 | H Skoff | 3 | 7 | 6 | | | | | | | | | | | 4 | H Skoff | 6 | 7 |
| | A Antonitsch | 6 | 5 | 2 | 4 | H Skoff | 6 | 6 | 6 | | | | | | | | | |
| WC | R Wawra | 2 | 4 | | Q | D Poliakov | 7 | 4 | 2 | | | | | | | | | |
| Q | D Poliakov | 6 | 6 | | | | | | | 4 | H Skoff | 6 | 6 | | | | | |
| | M Sinner | 2 | 6 | | | | | | | | L Jonsson | 4 | 3 | | | | | |
| | L Jonsson | 6 | 7 | | | L Jonsson | 6 | 6 | | | | | | | | | | |
| | R Azar | 3 | 3 | | WC/5 | C-U Steeb | 3 | 3 | | | | | | | | | | |
| WC/5 | C-U Steeb | 6 | 6 | | | | | | | | | | | | | | | |

### Section 2

| 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 | A Volkov | 7 | 6 | | | | | | | | | | | | | | |
| | T Högstedt | 6 | 4 | | 6 | A Volkov | 7 | 6 | | | | | | | | | |
| | J Wöhrmann | 7 | 6 | | | J Wöhrmann | 5 | 3 | | | | | | | | | |
| Q | H Mair | 5 | 1 | | | | | | | 6 | A Volkov | 6 | 6 | | | | |
| Q | J Siemerink | 4 | 7 | 6 | | | | | | 3 | M Jaite | 2 | 1 | | | | |
| WC | P McEnroe | 6 | 5 | 3 | Q | J Siemerink | 3 | 3 | | | | | | | | | |
| | T Carbonell | 6 | 4 | | 3 | M Jaite | 6 | 6 | | | | | | | | | |
| 3 | M Jaite | 7 | 6 | | | | | | | | | | | 6 | A Volkov | 2 | 5 |
| 8 | M Stich | 5 | 2 | | | | | | | | | | | | A Järryd | 6 | 7 |
| | A Järryd | 7 | 6 | | | A Järryd | 6 | 6 | | | | | | | | | |
| | J Cunha Silva | 6 | 3 | | | P Kühnen | 3 | 4 | | | | | | | | | |
| | P Kühnen | 7 | 6 | | | | | | | | A Järryd | 7 | 6 | | | | |
| | J Gunnarsson | 6 | 6 | 6 | | | | | | 2 | J McEnroe | 6 | 2 | | | | |
| | U Riglewski | 7 | 3 | 7 | | U Riglewski | 7 | 4 | 3 | | | | | | | | |
| | B Garrow | 6 | 6 | 4 | 2 | P McEnroe | 6 | 6 | 6 | | | | | | | | |
| 2 | J McEnroe | 4 | 7 | 6 | | | | | | | | | | | | | |