1990 Estoril Open – Women's singles
| Women's singles | |
|---|---|
| 1990 Estoril Open | |
| Champion | Federica Bonsignori |
| Runner-up | Laura Garrone |
| Score | 2–6, 6–3, 6–3 |
| Draw | 32 (2WC/4Q/1LL) |
| Seeds | 8 |
Isabel Cueto was the defending champion, but lost in the quarterfinals to Federica Bonsignori.
Bonsignori won the title by defeating Laura Garrone 2–6, 6–3, 6–3 in the final.