The 1999 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 1999 ATP Tour. It was the 25th edition of the tournament and was held from 11 October until 18 October 1999. Fifth-seeded Greg Rusedski won the singles title.
See main article: 1999 CA-TennisTrophy – Singles. Greg Rusedski defeated Nicolas Kiefer 6–7(5–7), 2–6, 6–3, 7–5, 6–4
See main article: 1999 CA-TennisTrophy – Doubles. David Prinosil / Sandon Stolle defeated Piet Norval / Kevin Ullyett 6–3, 6–4