# 1989 Belgian Open – Singles

Arantxa Sánchez was the defending champion but did not compete that year.
Radka Zrubáková won in the final 7–6, 6–4 against Mercedes Paz.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Jana Novotná (quarterfinals)
* Radka Zrubáková (champion)
* Manon Bollegraf (semifinals)
* Sandra Wasserman (quarterfinals)
* Neige Dias (first round)
* Brenda Schultz (quarterfinals)
* Mercedes Paz (final)
* Angeliki Kanellopoulou (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 | J Novotná | 6 | 6 | | | | | | | | | | | | | | | | | | | | |
| | A Devries | 1 | 1 | | 1 | J Novotná | 6 | 6 | | | | | | | | | | | | | | | |
| | A Farley | 0 | 5 | | | W Probst | 3 | 2 | | | | | | | | | | | | | | | |
| | W Probst | 6 | 7 | | | | | | | 1 | J Novotná | 0 | 6 | 2 | | | | | | | | | |
| | B Romanò | 7 | 1 | 6 | | | | | | 7 | M Paz | 6 | 2 | 6 | | | | | | | | | |
| | S Frankl | 6 | 6 | 1 | | B Romanò | 4 | 3 | | | | | | | | | | | | | | | |
| | C van Renterghem | 6 | 6 | | 7 | M Paz | 6 | 6 | | | | | | | | | | | | | | | |
| 7 | M Paz | 7 | 7 | | | | | | | | | | | | 7 | M Paz | 6 | 6 | 6 | | | | |
| 3 | M Bollegraf | 6 | 1 | 7 | | | | | | | | | | | 3 | M Bollegraf | 7 | 4 | 3 | | | | |
| | S Meier | 0 | 6 | 5 | 3 | M Bollegraf | 6 | 6 | | | | | | | | | | | | | | | |
| | C Caverzasio | 4 | 6 | 6 | | C Caverzasio | 2 | 2 | | | | | | | | | | | | | | | |
| | N Herreman | 6 | 2 | 1 | | | | | | 3 | M Bollegraf | 6 | 4 | 6 | | | | | | | | | |
| | C Bakkum | 1 | 2 | | | | | | | | L Lásková | 4 | 6 | 4 | | | | | | | | | |
| | L Lásková | 6 | 6 | | | L Lásková | 6 | 6 | | | | | | | | | | | | | | | |
| LL | M Maleeva | 2 | 6 | 6 | LL | M Maleeva | 4 | 0 | | | | | | | | | | | | | | | |
| 5 | N Dias | 6 | 3 | 2 | | | | | | | | | | | | | | | | 7 | Mercedes Paz | 6 | 4 |
| 8 | A Kanellopoulou | 6 | 6 | | | | | | | | | | | | | | | | | 2 | Radka Zrubáková | 7 | 6 |
| | I de Ruysscher | 2 | 4 | | 8 | A Kanellopoulou | 6 | 4 | 0 | | | | | | | | | | | | | | |
| Q | N Medvedeva | 4 | 0 | | | N Jagerman | 4 | 6 | 6 | | | | | | | | | | | | | | |
| | N Jagerman | 6 | 6 | | | | | | | | N Jagerman | 6 | 4 | 7 | | | | | | | | | |
| Q | A Leand | 1 | 3 | | | | | | | 4 | S Wasserman | 3 | 6 | 6 | | | | | | | | | |
| | L Lapi | 6 | 6 | | | L Lapi | 6 | 4 | 0 | | | | | | | | | | | | | | |
| | S Appelmans | 1 | 4 | | 4 | S Wasserman | 3 | 6 | 6 | | | | | | | | | | | | | | |
| 4 | S Wasserman | 6 | 6 | | | | | | | | | | | | | N Jagerman | 3 | 1 | | | | | |
| 6 | B Schultz | 6 | 7 | | | | | | | | | | | | 2 | R Zrubáková | 6 | 6 | | | | | |
| | C Wood | 2 | 5 | | 6 | B Schultz | 6 | 6 | | | | | | | | | | | | | | | |
| | S La Fratta | 6 | 4 | 6 | Q | M Laval | 3 | 1 | | | | | | | | | | | | | | | |
| Q | M Laval | 1 | 6 | 7 | | | | | | 6 | B Schultz | 2 | 3 | | | | | | | | | | |
| Q | S Farina | 5 | 2 | | | | | | | 2 | R Zrubáková | 6 | 6 | | | | | | | | | | |
| | N Guerrée | 7 | 6 | | | N Guerrée | 0 | 1 | | | | | | | | | | | | | | | |
| | M-C Damas | 4 | 4 | | 2 | R Zrubáková | 6 | 6 | | | | | | | | | | | | | | | |
| 2 | R Zrubáková | 6 | 6 | | | | | | | | | | | | | | | | | | | | |