| Singles | |
|---|---|
| 1989 ABN World Tennis Tournament | |
| 1988 Champion |  Stefan Edberg |
| Champion |  Jakob Hlasek |
| Runner-up | Anders Järryd |
| Final score | 6–1, 7–5 |
| Draw | 32 |
| Seeds | 8 |
Stefan Edberg was the defending champion but did not compete that year.
Jakob Hlasek won in the final 6–1, 7–5 against Anders Järryd.
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
Miloslav Mečíř (first round) Jakob Hlasek (champion)
Yannick Noah (semifinals) Jonas Svensson (first round)
John Fitzgerald (first round) Darren Cahill (semifinals) Anders Järryd (final) Magnus Gustafsson (second round)| First round | Second round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||||||||
| 1 | M Mečíř | 5 | 1 | |||||||||||||||||||||||||||||||
| WC |  P Kühnen | 7 | 6 | WC | P Kühnen | 0 | 6 | |||||||||||||||||||||||||||
| Q |  M Ostoja | 3 | 2 |  M Schapers | 6 | 7 | ||||||||||||||||||||||||||||
| M Schapers | 6 | 6 | M Schapers | 7 | 1 | 3 | ||||||||||||||||||||||||||||
| J Gunnarsson | 3 | 4 | 7 | A Järryd | 6 | 6 | 6 | |||||||||||||||||||||||||||
| W Masur | 6 | 6 | W Masur | 2 | 1 | |||||||||||||||||||||||||||||
| WC | M Koevermans | 3 | 1 | 7 | A Järryd | 6 | 6 | |||||||||||||||||||||||||||
| 7 | A Järryd | 6 | 6 | 7 | A Järryd | 6 | 6 | |||||||||||||||||||||||||||
| 4 | J Svensson | 2 | 4 | 6 | D Cahill | 2 | 4 | |||||||||||||||||||||||||||
 M Davis | 6 | 6 | M Davis | 6 | 6 | |||||||||||||||||||||||||||||
| Q | M Westphal | 5 | 6 |  L Lavalle | 2 | 3 | ||||||||||||||||||||||||||||
| L Lavalle | 7 | 7 | M Davis | 3 | 6 | |||||||||||||||||||||||||||||
| C Mezzadri | 7 | 2 | 2 | 6 | D Cahill | 6 | 7 | |||||||||||||||||||||||||||
| C Saceanu | 6 | 6 | 6 | C Saceanu | 6 | 6 | ||||||||||||||||||||||||||||
| J Lozano | 2 | 7 | 3 | 6 | D Cahill | 7 | 7 | |||||||||||||||||||||||||||
| 6 | D Cahill | 6 | 6 | 6 | 7 | Anders Järryd | 1 | 5 | ||||||||||||||||||||||||||
| 5 | J Fitzgerald | 3 | 6 | 2 | 2 | Jakob Hlasek | 6 | 7 | ||||||||||||||||||||||||||
 O Rahnasto | 6 | 3 | 6 | O Rahnasto | 3 | 6 | 1 | |||||||||||||||||||||||||||
| U Riglewski | 6 | 6 | U Riglewski | 6 | 2 | 6 | ||||||||||||||||||||||||||||
 E Masso | 3 | 0 | U Riglewski | 1 | 5 | |||||||||||||||||||||||||||||
| M Šrejber | 4 | 6 | 3 | 3 | Y Noah | 6 | 7 | |||||||||||||||||||||||||||
| C Bergström | 6 | 4 | 6 | C Bergström | 3 | 5 | ||||||||||||||||||||||||||||
| WC | T Nijssen | 3 | 2 | 3 | Y Noah | 6 | 7 | |||||||||||||||||||||||||||
| 3 | Y Noah | 6 | 6 | 3 | Y Noah | 6 | 2 | |||||||||||||||||||||||||||
| 8 | M Gustafsson | 6 | 6 | 2 | J Hlasek | 7 | 6 | |||||||||||||||||||||||||||
 D Nargiso | 4 | 4 | 8 | M Gustafsson | 3 | 2 | ||||||||||||||||||||||||||||
| Q | A Lesch | 2 | 4 | E Jelen | 6 | 6 | ||||||||||||||||||||||||||||
| E Jelen | 6 | 6 | E Jelen | 1 | 1 | |||||||||||||||||||||||||||||
| P Canè | 6 | 3 | 7 | 2 | J Hlasek | 6 | 6 | |||||||||||||||||||||||||||
| Q | R Kok | 3 | 6 | 6 | P Canè | 2 | 1 | |||||||||||||||||||||||||||
| T Svantesson | 6 | 2 | 2 | J Hlasek | 6 | 6 | ||||||||||||||||||||||||||||
| 2 | J Hlasek | 7 | 6 | |||||||||||||||||||||||||||||||
Stefan Edberg was the defending champion but lost in the semifinals to Shuzo Matsuoka.
Jeremy Bates and Jonas Björkman were the defending champions, but chose not to participate that year.
Jakob Hlasek and Anders Järryd were the defending champions, but did not participate together this year. Hlasek partnered Guy Forget, losing in the semifinals. Järryd partnered John Fitzgerald, losing in the second round.
Jorge Lozano and Todd Witsken were the defending champions, but lost in the quarterfinals this year.
Paul Annacone and John Fitzgerald were the defending champions but they competed with different partners that year, Annacone with Christo van Rensburg and Fitzgerald with Anders Järryd.
John Fitzgerald and Anders Järryd were the defending champions but only Järryd competed that year with Jakob Hlasek.
Boris Becker and Guy Forget were the defending champions but only Becker competed that year with Jakob Hlasek.
Anders Järryd was the defending champion of the singles event at the CA-TennisTrophy tennis tournament but lost in the quarterfinals to Michael Stich.
Udo Riglewski and Michael Stich were the defending champions of the doubles event at the CA-TennisTrophy tennis tournament but lost in the semifinals to Jakob Hlasek and Patrick McEnroe.
Ken Flach and Robert Seguso were the defending champions but lost in the semifinals to John Fitzgerald and Anders Järryd.
Yahiya Doumbia was the defending champion but lost in the first round to Jakob Hlasek.
Richard Krajicek and Jan Siemerink were the defending champions but lost in the first round to Kenneth Carlsen and Frederik Fetterlein.
Scott Davis and David Pate were the defending champions, but lost in the second round this year.
John Fitzgerald and Anders Järryd were the defending champions, but lost in the semifinals this year.
Paul Annacone and Christo van Rensburg were the defending champions, but lost in the semifinals to Swedes and top seeds Stefan Edberg and Anders Järryd.
Guy Forget and Jakob Hlasek were the defending champions, but Forget did not participate this year. Hlasek partnered Patrick McEnroe, losing in the quarterfinals.
Henrik Holm and Anders Järryd were the defending champions, but competed this year with different partners.
No defending champions were officially declared as the last edition dates back to 1976, which was won by Lars Elvstrøm.
Leonardo Lavalle and Jorge Lozano were the defending champions, but lost in the first round to Patrick Galbraith and Anders Järryd.