| 1998 CA-TennisTrophy | |
|---|---|
| Date | 12–19 October |
| Edition | 24th |
| Category | Championship Series (Double-Up Week) |
| Draw | 32S / 16D |
| Prize money | $675,000 |
| Surface | Hard / indoor |
| Location | Vienna, Austria |
| Venue | Wiener Stadthalle |
| Champions | |
| Singles | |
 Pete Sampras[1] | |
| Doubles | |
 Yevgeny Kafelnikov /  Daniel Vacek[2] | |
The 1998 CA-TennisTrophy was a men's tennis tournament played on indoor carpet courts at the Wiener Stadthalle in Vienna, Austria and was part of the Championship Series of the 1998 ATP Tour. It was the 24th edition of the tournament and was held from 12 October through 19 October 1998. First-seeded Pete Sampras, who entered the event on a wildcard, won the singles title.
- ^ "1998 Vienna – Singles draw". Association of Tennis Professionals (ATP).
- ^ "1998 Vienna – Doubles draw". Association of Tennis Professionals (ATP).