1991 Grand Prix de Tennis de Lyon – Singles
| Singles | |
|---|---|
| 1991 Grand Prix de Tennis de Lyon | |
| Champion |
 Pete Sampras
|
| Runner-up |
 Olivier Delaître
|
| Final score | 6–1, 6–1 |
Marc Rosset was the defending champion, but lost in the first round this year.
Pete Sampras won the title, beating Olivier Delaître 6–1, 6–1 in the final.
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