| 1989 Swiss Indoors | |
|---|---|
| Date | 3–8 October |
| Edition | 20th |
| Category | Grand Prix |
| Draw | 32S / 16D |
| Prize money | $361,000 |
| Surface | Carpet / indoor |
| Location | Basel, Switzerland |
| Venue | St. Jakobshalle |
| Champions | |
| Singles | |
 Jim Courier[1] | |
| Doubles | |
 Udo Riglewski / Michael Stich[2] | |
The 1989 Swiss Indoors was a men's tennis tournament played on indoor carpet courts at the St. Jakobshalle in Basel, Switzerland that was part of the 1989 Nabisco Grand Prix circuit. It was the 20th edition of the tournament and took place from 3 October until 8 October 1989. Unseeded Jim Courier won the singles title.[3]
- ^ "1989 Basel – Singles draw". Association of Tennis Professionals (ATP).
- ^ "1989 Basel – Doubles draw". Association of Tennis Professionals (ATP).
- ^ John Barrett, ed. (1990). The International Tennis Federation : World of Tennis 1990. London: Willow Books. p. 149. ISBN 9780002183550.