The 2003 Allianz Suisse Open Gstaad was a tennis tournament played on outdoor clay courts at the Roy Emerson Arena in Gstaad in Switzerland and was part of the International Series of the 2003 ATP Tour. The tournament ran from July 7 through July 13, 2003.
| 2003 Allianz Suisse Open Gstaad | |
|---|---|
| Date | 7–13 July |
| Edition | 58th |
| Category | International Series |
| Draw | 32S / 16D |
| Prize money | $525,000 |
| Surface | Clay / outdoor |
| Location | Gstaad, Switzerland |
| Venue | Roy Emerson Arena |
| Champions | |
| Singles | |
 Jiří Novák | |
| Doubles | |
 Leander Paes / David Rikl | |
Finals edit
Singles edit
Jiří Novák defeated 
Roger Federer 5–7, 6–3, 6–3, 1–6, 6–3
- It was Novák's only title of the year and the 20th of his career.
Doubles edit
Leander Paes / David Rikl defeated František Čermák / Leoš Friedl 6–3, 6–3
- It was Paes' 3rd title of the year and the 27th of his career. It was Rikl's 2nd title of the year and the 28th of his career.