# 1990 Geneva Open – Singles

Marc Rosset was the defending champion, but lost in the semifinals this year.
Horst Skoff won the title, defeating Sergi Bruguera 7–6$^{(10–8)}$, 7–6$^{(7–4)}$ in the final.

## Seeds

* Henri Leconte (quarterfinals)
* Horst Skoff (champion)
* Jakob Hlasek (second round)
* Marc Rosset (semifinals)
* Omar Camporese (quarterfinals)
* Sergi Bruguera (final)
* Goran Prpić (first round)
* Franco Davín (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 | Semifinals | Final | Final | Final | Final |
| | Michael Tauson | 1 | 2 | | | | | |
| 6 | Sergi Bruguera | 6 | 6 | | | | | |
| 6 | Sergi Bruguera | 6 | 6 | | 6 | Sergi Bruguera | 6$^8$ | 6$^4$ |
| | | | | | 2 | Horst Skoff | 7$^{10}$ | 7$^7$ |
| 4 | Marc Rosset | 6 | 3 | 2 | 2 | Horst Skoff | 7$^{10}$ | 7$^7$ |
| 2 | Horst Skoff | 4 | 6 | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1/WC | H Leconte | 6 | 6 | | | | | | | | | | | | | |
| | J Cunha-Silva | 3 | 4 | | 1/WC | H Leconte | 6 | 6 | | | | | | | | |
| | L Jönsson | 5 | 6 | 6 | | L Jönsson | 1 | 2 | | | | | | | | |
| | D Engel | 7 | 3 | 2 | | | | | 1/WC | H Leconte | 4 | 3 | | | | |
| | N Kulti | 4 | 3 | | | | | | | M Tauson | 6 | 6 | | | | |
| | M Tauson | 6 | 6 | | | M Tauson | 6 | 6 | | | | | | | | |
| WC | C Mezzadri | 7 | 6 | 1 | 8 | F Davín | 3 | 4 | | | | | | | | |
| 8 | F Davín | 5 | 7 | 6 | | | | | | | | | | M Tauson | 1 | 2 |
| 3 | J Hlasek | 6 | 6 | | | | | | | | | | 6 | S Bruguera | 6 | 6 |
| | M Střelba | 4 | 3 | | 3 | J Hlasek | 4 | 2 | | | | | | | | |
| Q | D Orsanic | 5 | 6 | 2 | WC | H de la Peña | 6 | 6 | | | | | | | | |
| WC | H de la Peña | 7 | 2 | 6 | | | | | WC | H de la Peña | 0 | 2 | | | | |
| | J Gunnarsson | 6 | 3 | 6 | | | | | 6 | S Bruguera | 6 | 6 | | | | |
| | C Motta | 3 | 6 | 2 | | J Gunnarsson | 5 | 2 | | | | | | | | |
| | R Azar | 1 | 3 | | 6 | S Bruguera | 7 | 6 | | | | | | | | |
| 6 | S Bruguera | 6 | 6 | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | O Camporese | 6 | 6 | | | | | | | | | | | | | | |
| | B Orešar | 4 | 4 | | 5 | O Camporese | 6 | 6 | | | | | | | | | |
| | U Riglewski | 6 | 3 | | | M Vajda | 4 | 4 | | | | | | | | | |
| | M Vajda | 7 | 6 | | | | | | 5 | O Camporese | 6 | 6 | | | | | |
| Q | R Argüello | 5 | 3 | | | | | | 4 | M Rosset | 7 | 7 | | | | | |
| | A Mronz | 7 | 6 | | | A Mronz | 4 | 2 | | | | | | | | | |
| Q | P Albano | 4 | 2 | | 4 | M Rosset | 6 | 6 | | | | | | | | | |
| 4 | M Rosset | 6 | 6 | | | | | | | | | | 4 | M Rosset | 6 | 3 | 2 |
| 7 | G Prpić | 4 | 7 | 4 | | | | | | | | | 2 | H Skoff | 4 | 6 | 6 |
| | R Furlan | 6 | 6 | 6 | | R Furlan | 6 | 6 | | | | | | | | | |
| Q | JA Conde | 6 | 6 | | Q | JA Conde | 2 | 4 | | | | | | | | | |
| | M Kaplan | 4 | 1 | | | | | | | R Furlan | 6 | 6 | | | | | |
| | F Clavet | 3 | 1 | | | | | | 2 | H Skoff | 7 | 7 | | | | | |
| | P Canè | 6 | 6 | | | P Canè | 4 | 2 | | | | | | | | | |
| | C Bergström | 4 | 4 | | 2 | H Skoff | 6 | 6 | | | | | | | | | |
| 2 | H Skoff | 6 | 6 | | | | | | | | | | | | | | |