| Doubles | |
|---|---|
| 1989 Belgian Open | |
| 1988 Champions |  Mercedes Paz  Tine Scheuer-Larsen |
| Champions |  Manon Bollegraf Mercedes Paz |
| Runners-up | Carin Bakkum Simone Schilder |
| Score | 6–1, 6–2 |
Mercedes Paz and Tine Scheuer-Larsen were the defending champions but only Paz competed that year with Manon Bollegraf.
Bollegraf and Paz won in the final 6–1, 6–2 against Carin Bakkum and Simone Schilder.
Champion seeds are indicated in bold text while text in italics indicates the round in which those seeds were eliminated.
Manon Bollegraf / Mercedes Paz (champions) Carin Bakkum / Simone Schilder (final)
Nathalie Herreman / 
Sandra Wasserman (semifinals)
Neige Dias / 
Silvia La Fratta (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | 7 | 6 | |||||||||||||||||||||||||
| 5 | 4 | 1 | 6 | 6 | |||||||||||||||||||||||
| 6 | 6 | 1 | 2 | ||||||||||||||||||||||||
| 0 | 1 | 1 | w/o | ||||||||||||||||||||||||
| 4 | 2 | 5 | |||||||||||||||||||||||||
| 6 | 7 | 7 | 6 | ||||||||||||||||||||||||
| 6 | 4 | 6 | 5 | 3 | |||||||||||||||||||||||
| 2 | 6 | 4 | 1 | 6 | 6 | ||||||||||||||||||||||
| 2 | 1 | 2 | |||||||||||||||||||||||||
| w/o | 2 | 4 | |||||||||||||||||||||||||
| 6 | 4 | 2 | 3 | 6 | 6 | ||||||||||||||||||||||
| 3 | 3 | 6 | 6 | 3 | 4 | 2 | |||||||||||||||||||||
| 6 | 6 | 2 | 6 | 6 | |||||||||||||||||||||||
| 2 | 4 | 3 | 3 | ||||||||||||||||||||||||
| 5 | 7 | 4 | 2 | 6 | 6 | ||||||||||||||||||||||
| 2 | 7 | 6 | 6 | ||||||||||||||||||||||||
Zina Garrison-Jackson and Larisa Neiland were the defending champions but only Garrison-Jackson competed that year with Katrina Adams.
Martina Navratilova and Gabriela Sabatini were the defending champions but did not compete that year.
Claudia Kohde-Kilsch and Helena Suková were the defending champions but lost in the final 6–2, 4–6, 6–4 against Isabelle Demongeot and Nathalie Tauziat.
Katrina Adams and Zina Garrison were the defending champions of the doubles event but lost in the quarterfinals of the 1989 Virginia Slims of Florida tennis tournament to Manon Bollegraf and Eva Pfaff.
Steffi Graf and Gabriela Sabatini were the defending champions but only Sabatini competed that year with Betsy Nagelsen.
Jana Novotná and Tine Scheuer-Larsen were the defending champions but they competed with different partners that year, Novotná with Helena Suková and Scheuer-Larsen with Catarina Lindqvist.
Jana Novotná and Catherine Suire were the defending champions but only Suire competed that year with Helen Kelesi.
Manon Bollegraf and Nicole Provis were the defending champions but they competed with different partners that year, Bollegraf with Eva Pfaff and Provis with Elna Reinach.
The 1989 Belgian Open was a women's tennis tournament played on outdoor clay courts in Brussels, Belgium that was part of the Category 2 tier of the 1989 WTA Tour. It was the third edition of the tournament and was held from 17 July until 23 July 1989. Second-seeded Radka Zrubáková won the singles title.
Arantxa Sánchez was the defending champion but did not compete that year.
In the 1989 Volvo Open women's doubles tennis tournament, Sandra Cecchini and Mercedes Paz were the defending champions but only Paz competed that year with Tine Scheuer-Larsen.
Arantxa Sánchez Vicario and Natasha Zvereva were the defending champions but lost in the final 6–2, 3–6, 6–3 against Martina Hingis and Jana Novotná.
Lori McNeil and Mercedes Paz were the defending champions but only Paz competed that year with Gabriela Sabatini.
Claudia Kohde-Kilsch and Jana Novotná were the defending champions but only Novotná competed that year with Tine Scheuer-Larsen.
Lise Gregory and Ronni Reis were the defending champions but did not compete that year.
Katrina Adams and Cheryl Jones were the defending champions but did not compete that year.
Lisa Raymond and Patrick Galbraith were the defending champions but lost in the semifinals to Mercedes Paz and Pablo Albano.
Gigi Fernández and Martina Navratilova were the defending champions but lost in the third round to Katrina Adams and Manon Bollegraf.
Jo Durie and Jeremy Bates were the defending champions but lost in the quarterfinals to Robin White and Scott Davis.
Gigi Fernández and Natasha Zvereva were the two-time defending champions, and successfully defended their title, defeating Lindsay Davenport and Lisa Raymond in the final 6–2, 6–2.
