1990 Mercedes Cup

The 1990 Mercedes Cup, was a men's tennis tournament played on outdoor clay courts and held at the Tennis Club Weissenhof in Stuttgart, West Germany that was part of the Championship Series of the 1990 ATP Tour. It was the 13th edition of the tournament was held from 16 July until 22 July 1990. Tenth-seeded Goran Ivanišević won the singles title.

Singles
Goran Ivanišević defeated 🇦🇷 Guillermo Pérez Roldán, 6–7(2–7), 6–1, 6–4, 7–6(7–5)
 * It was Ivanišević' first singles title of his career.

Doubles
Pieter Aldrich / Danie Visser defeated 🇸🇪 Per Henricsson / 🇸🇪 Nicklas Utgren, 6–3, 6–4