1990 Athens Open
|1990 Athens Open|
|Date||1 – 7 October|
|Surface||Clay / Outdoor|
|Sergio Casal / Javier Sánchez|
The 1990 ATP Athens Open was a men's tennis tournament played on outdoor clay courts in Athens in Greece that was part of the World Series of the 1990 ATP Tour. It was held from 1 October through 7 October 1990. Seventh-seeded Mark Koevermans won the singles title.
- It was Koevermans' only title of the year and the 1st of his career.
- It was Casal's 7th title of the year and the 32nd of his career. It was Sánchez's 4th title of the year and the 10th of his career.
- 1990 Athens Trophy – women's tournament