| Singles | |
|---|---|
| 1989 Virginia Slims of Oklahoma | |
| 1988 Champion |
|
| Champion |
|
| Runner-up |
|
| Final score | 6–4, 6–4 |
Lori McNeil was the defending champion but lost in the second round to Betsy Nagelsen.
Manon Bollegraf won in the final 6–4, 6–4 against Leila Meskhi.
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.