1990 Geneva Open – SinglesMarc Rosset was the defending champion, but lost in the semifinals this year.Horst Skoff won the title, defeating Sergi Bruguera 7–6, 7–6 in the final.Seeds Henri Leconte ' Horst Skoff Jakob Hlasek ' Marc Rosset ' Omar Camporese ' Sergi Bruguera ' Goran Prpić ' Franco Davín ''''