1990 Mercedes Cup – Singles

Singles
1990 Mercedes Cup
Champion Goran Ivanišević
Runner-up Guillermo Pérez Roldán
Score6–7(2–7), 6–1, 6–4, 7–6(7–5)
Draw48 (3WC/5Q)
Seeds16

Martín Jaite was the defending champion, but lost in the second round to Karel Nováček.

Goran Ivanišević won the title by defeating Guillermo Pérez Roldán 6–7(2–7), 6–1, 6–4, 7–6(7–5) in the final.