1989 Athens Open – Singles

Horst Skoff was the defending champion but did not compete that year.

Ronald Agénor won in the final 6–3, 6–4 against Kent Carlsson.

Seeds

 * 1) 🇸🇪 Kent Carlsson (final)
 * 2)  Ronald Agénor (champion)
 * 3) 🇺🇸 Lawson Duncan (quarterfinals)
 * 4) 🇪🇸 Fernando Luna (first round)
 * 5)  Andres Võsand (first round)
 * 6)  Martin Střelba (quarterfinals)
 * 7)  Ricki Osterthun (second round)
 * 8) 🇮🇹 Francesco Cancellotti (quarterfinals)