1990 Grand Prix de Tennis de Lyon

The 1990 Grand Prix de Tennis de Lyon was a men's tennis tournament played on indoor carpet courts at the Palais des Sports de Gerland in Lyon, France, and was part of the World Series of the 1990 ATP Tour. It was the fourth edition of the tournament and took place from 15 October through 22 October 1990. Sixth-seeded Marc Rosset won the singles title.

Singles
Marc Rosset defeated 🇸🇪 Mats Wilander 6–3, 6–2
 * It was Rosset's only title of the year and the 2nd of his career.

Doubles
🇺🇸 Patrick Galbraith / 🇺🇸 Kelly Jones defeated 🇺🇸 Jim Grabb / 🇺🇸 David Pate 7–6, 6–4
 * It was Galbraith's 2nd title of the year and the 3rd of his career. It was Jones' 4th title of the year and the 7th of his career.