1991 CA-TennisTrophy
| 1991 CA-TennisTrophy | |
|---|---|
| Date | October 14 – October 21 |
| Edition | 17th |
| Category | World Series |
| Surface | Carpet / Indoor |
| Location | Vienna, Austria |
| Venue | Wiener Stadthalle |
| Champions | |
| Singles | |
 Michael Stich
|
|
| Doubles | |
 Anders Järryd /  Gary Muller
|
|
The 1991 CA-TennisTrophy was a tennis tournament played on indoor carpet courts at the Wiener Stadthalle in Vienna in Austria and was part of the World Series of the 1991 ATP Tour. The tournament ran from October 14 through October 21, 1991.
Michael Stich defeated 
Jan Siemerink 6–4, 6–4, 6–4
Anders Järryd / Gary Muller defeated 
Jakob Hlasek / 
Patrick McEnroe 6–4, 7–5
...
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