The 1989 Athens Open was a men's tennis tournament played on outdoor clay courts in Athens in Greece that was part of the 1989 Nabisco Grand Prix.

It was the fourth edition of the tournament and was held from 10 April through 16 April 1989.

Second-seeded Ronald Agénor won the singles title.

[3] Ronald Agénor defeated Kent Carlsson 6–3, 6–4 Claudio Panatta / Tomáš Šmíd defeated Gustavo Giussani / Gerardo Mirad 6–3, 6–2