| Singles | |
|---|---|
| 1990 BP National Championships | |
| 1989 Champion |
|
| Champion |
|
| Runner-up |
|
| Final score | 6–7, 6–4, 4–6, 6–4, 6–1 |
Kelly Evernden was the defending champion but lost in the first round to Lars-Anders Wahlgren.
Emilio Sánchez won in the final 6–7, 6–4, 4–6, 6–4, 6–1 against Richey Reneberg.
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.