1989 Estoril Open

The 1989 Estoril Open was a women's tennis tournament played on outdoor clay courts at the Estoril Court Central in Oeiras, Portugal that was part of the Category 2 tier of the 1989 WTA Tour. It was the first edition of the tournament and was held from 17 July through 23 July 1989. Third-seeded Isabel Cueto won the singles title.

Singles
Isabel Cueto defeated 🇮🇹 Sandra Cecchini 7–6(7–3), 6–2
 * It was Cueto's 1st title of the year and the 4th of her career.

Doubles
Iva Budařová / Regina Rajchrtová defeated 🇦🇷 Gaby Castro / 🇪🇸 Conchita Martínez 6–2, 6–4
 * It was Budařová's only title of the year and the 4th of her career. It was Rajchrtová's only title of the year and the 1st of her career.