1990 BMW Open – Singles

Andrei 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

 * 1) 🇸🇪 Stefan Edberg (second round)
 * 2) 🇺🇸 Aaron Krickstein (second round)
 * 3) 🇺🇸 Michael Chang (first round)
 * 4) 🇺🇸 Jim Courier (quarterfinals)
 * 5)  Carl-Uwe Steeb (second round)
 * 6) 🇺🇸 Pete Sampras (first round)
 * 7) 🇦🇷 Guillermo Pérez Roldán (first round)
 * 8) 🇦🇹 Horst Skoff (first round)