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]
← 1997 · Vienna Open · 1999 →

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.

Finals

Singles

Pete Sampras defeated Karol Kučera 6–3, 7–6^(7–3), 6–1

• It was Sampras' 4th title of the year and the 58th of his career.

Doubles

Yevgeny Kafelnikov / Daniel Vacek defeated David Adams / John-Laffnie de Jager 7–5, 6–3

• It was Kafelnikov's 4th title of the year and the 34th of his career. It was Vacek's only title of the year and the 20th of his career.