1990 Geneva Open – Singles

Marc Rosset was the defending champion, but lost in the semifinals this year.

Horst Skoff won the title, defeating Sergi Bruguera 7–6(10–8), 7–6(7–4) in the final.

Seeds

 * 1) 🇫🇷 Henri Leconte (quarterfinals)
 * 2) 🇦🇹 Horst Skoff (champion)
 * 3)  Jakob Hlasek (second round)
 * 4)  Marc Rosset (semifinals)
 * 5) 🇮🇹 Omar Camporese (quarterfinals)
 * 6) 🇪🇸 Sergi Bruguera (final)
 * 7)  Goran Prpić (first round)
 * 8) 🇦🇷 Franco Davín (second round)