# 1989 Swatch Open – Singles

Henri Leconte was the defending champion but lost in the second round to Goran Ivanišević.
Andrei Chesnokov won in the final 6–4, 6–4 against Jérôme Potier.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Kent Carlsson (first round)
* Henri Leconte (second round)
* Guillermo Pérez Roldán (quarterfinals)
* Ronald Agénor (second round)
* Alberto Mancini (quarterfinals)
* Andrei Chesnokov (champion)
* Horst Skoff (second round)
* Jordi Arrese (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
| 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 | Semifinals | Final | Final | Final | Final |
| 1 | K Carlsson | 0 | 6 | 2 | | | | | | | | | | | | | | | | | | | |
| | C Pistolesi | 6 | 3 | 6 | | C Pistolesi | 6 | 6 | | | | | | | | | | | | | | | |
| Q | D Pérez | 6 | 6 | | Q | D Pérez | 3 | 2 | | | | | | | | | | | | | | | |
| | D Nargiso | 3 | 2 | | | | | | | | C Pistolesi | 6 | 3 | 2 | | | | | | | | | |
| | U Riglewski | 6 | 4 | 2 | | | | | | | F Cancellotti | 4 | 6 | 6 | | | | | | | | | |
| | F Cancellotti | 3 | 6 | 6 | | F Cancellotti | 5 | 6 | 6 | | | | | | | | | | | | | | |
| Q | M Koevermans | 4 | 4 | | 7 | H Skoff | 7 | 4 | 4 | | | | | | | | | | | | | | |
| 7 | H Skoff | 6 | 6 | | | | | | | | | | | | | F Cancellotti | 5 | 4 | | | | | |
| 4 | R Agénor | 7 | 6 | | | | | | | | | | | | WC | J Potier | 7 | 6 | | | | | |
| | T Meinecke | 5 | 3 | | 4 | R Agénor | 6 | 3 | 6 | | | | | | | | | | | | | | |
| | T Nijssen | 3 | 6 | 5 | WC | J Potier | 4 | 6 | 7 | | | | | | | | | | | | | | |
| WC | J Potier | 6 | 3 | 7 | | | | | | WC | J Potier | 2 | 6 | 6 | | | | | | | | | |
| | K Nováček | 6 | 6 | | | | | | | 5 | A Mancini | 6 | 4 | 2 | | | | | | | | | |
| | T Šmíd | 1 | 4 | | | K Nováček | 6 | 7 | 4 | | | | | | | | | | | | | | |
| | J Gunnarsson | 4 | 3 | | 5 | A Mancini | 7 | 6 | 6 | | | | | | | | | | | | | | |
| 5 | A Mancini | 6 | 6 | | | | | | | | | | | | | | | | | WC | Jérôme Potier | 4 | 4 |
| 6 | A Chesnokov | 6 | 6 | | | | | | | | | | | | | | | | | 6 | Andrei Chesnokov | 6 | 6 |
| | J Frawley | 0 | 2 | | 6 | A Chesnokov | 6 | 6 | | | | | | | | | | | | | | | |
| | L Duncan | 6 | 6 | | | L Duncan | 1 | 1 | | | | | | | | | | | | | | | |
| | T Tulasne | 2 | 1 | | | | | | | 6 | A Chesnokov | 7 | 6 | | | | | | | | | | |
| WC | A Boetsch | 2 | 4 | | | | | | | 3 | G Pérez Roldán | 6 | 4 | | | | | | | | | | |
| Q | M Bahrami | 6 | 6 | | Q | M Bahrami | 5 | 1 | | | | | | | | | | | | | | | |
| | E Masso | 0 | 0 | | 3 | G Pérez Roldán | 7 | 6 | | | | | | | | | | | | | | | |
| 3 | G Pérez Roldán | 6 | 6 | | | | | | | | | | | | 6 | A Chesnokov | 6 | 6 | 7 | | | | |
| 8 | J Arrese | 6 | 6 | | | | | | | | | | | | | G Ivanišević | 4 | 7 | 6 | | | | |
| WC | G Vilas | 0 | 2 | | 8 | J Arrese | 6 | 6 | 5 | | | | | | | | | | | | | | |
| | F Luna | 6 | 7 | | | F Luna | 7 | 1 | 7 | | | | | | | | | | | | | | |
| | F Davín | 2 | 6 | | | | | | | | F Luna | 6 | 3 | | | | | | | | | | |
| | M Střelba | 1 | 1 | | | | | | | | G Ivanišević | 7 | 6 | | | | | | | | | | |
| | G Ivanišević | 6 | 6 | | | G Ivanišević | 6 | 4 | 6 | | | | | | | | | | | | | | |
| Q | C Pioline | 5 | 6 | 3 | 2 | H Leconte | 4 | 6 | 3 | | | | | | | | | | | | | | |
| 2 | H Leconte | 7 | 4 | 6 | | | | | | | | | | | | | | | | | | | |