| Final score 2–6, 6–4, 6–4 Doubles men | Singles men men women | |
| Champions Scott Davis
 Broderick Dyke Runners-up Brad Pearce
 Byron Talbot | ||
Alexander Mronz and Greg Van Emburgh were the defending champions, but did not participate this year.
Scott Davis and Broderick Dyke won the title, defeating Brian Garrow and Sven Salumaa 2–6, 6–4, 6–4 in the final.
References
1989 OTB Open – Men's Doubles Wikipedia(Text) CC BY-SA
