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.
See main article: 2004 BA-CA-TennisTrophy – Singles. 
Feliciano López defeated 
Guillermo Cañas 6–4, 1–6, 7–5, 3–6, 7–5
See main article: 2004 BA-CA-TennisTrophy – Doubles. 
Martin Damm / Cyril Suk defeated Gastón Etlis / Martín Rodríguez 6–7(4–7), 6–4, 7–6(7–4)