| 2003 Davidoff Swiss Indoors | |
|---|---|
| Date | 20–26 October |
| Edition | 34th |
| Category | International Series |
| Draw | 32S / 16D |
| Prize money | $975,000 |
| Surface | Carpet / indoor |
| Location | Basel, Switzerland |
| Venue | St. Jakobshalle |
| Champions | |
| Singles | |
 Guillermo Coria[1] | |
| Doubles | |
 Mark Knowles /  Daniel Nestor[2] | |
The 2003 Davidoff Swiss Indoors was a men's tennis tournament played on indoor carpet courts at the St. Jakobshalle in Basel in Switzerland and was part of the International Series of the 2003 ATP Tour. The tournament ran from 20 October through 26 October 2003. Unseeded Guillermo Coria won the singles title.
- ^ "2003 Basel – Singles draw". Association of Tennis Professionals (ATP).
- ^ "2003 Basel – Doubles draw". Association of Tennis Professionals (ATP).