2005 BA-CA-TennisTrophy
 |
| 2005 BA-CA-TennisTrophy | |
|---|---|
| Date | 10–16 October |
| Edition | 31st |
| Category | International Series Gold |
| Draw | 32S / 16D |
| Prize money | $664,000 |
| Surface | Hard / indoor |
| Location | Vienna, Austria |
| Venue | Wiener Stadthalle |
| Champions | |
| Singles | |
 Ivan Ljubičić [1] | |
| Doubles | |
 Mark Knowles /  Daniel Nestor | |
The 2005 BA-CA-TennisTrophy was a men's tennis tournament played on indoor hard courts. It was the 31st edition of the event known that year as the BA-CA-TennisTrophy, and was part of the International Series Gold of the 2005 ATP Tour. It took place at the Wiener Stadthalle in Vienna, Austria, from 10 October until 16 October 2005. Fourth-seeded Ivan Ljubičić won the singles title.
Finals
Singles
Ivan Ljubičić defeated 
Juan Carlos Ferrero, 6–2, 6–4, 7–6(7–5)
- It was Ivan Ljubičić's 2nd title of the year, and his 3rd overall.
Doubles
Mark Knowles / Daniel Nestor defeated 
Jonathan Erlich / Andy Ram, 5–3, 5–4(7–4)