1990 BMW Open – SinglesAndrei Chesnokov was the defending champion, but did not participate this year.Karel Nováček won the title, defeating Thomas Muster 6–4, 6–2 in the final.Seeds Stefan Edberg ' Aaron Krickstein ' Michael Chang ' Jim Courier ' Carl-Uwe Steeb ' Pete Sampras ' Guillermo Pérez Roldán Horst Skoff ''''