See main article: 1990 BP National Championships. Kelly Evernden was the defending champion but lost in the first round to Lars-Anders Wahlgren.
Emilio Sánchez won in the final 6–7(3–7), 6–4, 4–6, 6–4, 6–1 against Richey Reneberg.[1]
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.