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.[1]
See main article: 1990 Athens Open – Singles. Mark Koevermans defeated Franco Davín 5–7, 6–4, 6–1
See main article: 1990 Athens Open – Doubles. Sergio Casal / Javier Sánchez defeated Tom Kempers / Richard Krajicek 6–4, 6–3