1990 Grand Prix de Tennis de Lyon – Singles
| Singles | |
|---|---|
| 1990 Grand Prix de Tennis de Lyon | |
| Champion |
 Marc Rosset
|
| Runner-up |
 Mats Wilander
|
| Final score | 6–3, 6–2 |
John McEnroe was the defending champion, but did not participate this year.
Marc Rosset won the title, beating Mats Wilander 6–3, 6–2 in the final.
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