1991 Geneva Open
| 1991 Geneva Open | |
|---|---|
| Date | September 9 – September 16 |
| Edition | 12th |
| Champions | |
| Singles | |
 Thomas Muster
|
|
| Doubles | |
 Sergi Bruguera /  Marc Rosset
|
|
The 1991 Geneva Open was a tennis tournament played on clay courts that was part of the World Series of the 1991 ATP Tour. It was played at Geneva in Switzerland from September 9 through September 16, 1991.
Thomas Muster defeated Horst Skoff 6–2, 6–4
Sergi Bruguera / Marc Rosset defeated 
Per Henricsson / Ola Jonsson 3–6, 6–3, 6–2
...
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