| 2004 BA-CA-TennisTrophy | |
|---|---|
| Date | 11–17 October |
| Edition | 30th |
| Category | International Series Gold |
| Draw | 32S / 16D |
| Prize money | $658,000 |
| Surface | Hard / indoor |
| Location | Vienna, Austria |
| Venue | Wiener Stadthalle |
| Champions | |
| Singles | |
 Feliciano López[1] | |
| Doubles | |
 Martin Damm / Cyril Suk[2] | |
The 2004 BA-CA-TennisTrophy was a tennis tournament played on indoor hard courts. It was the 30th edition of the event known that year as the BA-CA-TennisTrophy, and was part of the International Series Gold of the 2004 ATP Tour. It took place at the Wiener Stadthalle in Vienna, Austria, from 11 October through 17 October 2004.
- ^ "2004 Vienna – Singles draw". Association of Tennis Professionals (ATP).
- ^ "2004 Vienna – Doubles draw". Association of Tennis Professionals (ATP).