| 2003 MercedesCup | |
|---|---|
| Date | 14–20 July |
| Edition | 55th |
| Category | International Series Gold |
| Draw | 48S / 16D |
| Prize money | $665,000 |
| Surface | Clay / outdoor |
| Location | Stuttgart, Germany |
| Venue | Tennis Club Weissenhof |
| Champions | |
| Singles | |
 Guillermo Coria[1] | |
| Doubles | |
 Tomáš Cibulec / Pavel Vízner[2] | |
The 2003 MercedesCup was a men's tennis tournament played on outdoor clay courts at the Tennis Club Weissenhof in Stuttgart, Germany and was part of the International Series Gold of the 2003 ATP Tour. The tournament was held from 14 July until 20 July 2003. Second-seeded Guillermo Coria won the singles.
- ^ "2003 Stuttgart Outdoor – Singles draw". Association of Tennis Professionals (ATP).
- ^ "2003 Stuttgart Outdoor – Doubles draw". Association of Tennis Professionals (ATP).