| 2004 Open 13 | |
|---|---|
| Date | 23–29 February |
| Edition | 12th |
| Category | International Series |
| Draw | 32S / 16D |
| Prize money | $600,000 |
| Surface | Hard / indoor |
| Location | Marseille, France |
| Venue | Palais des Sports de Marseille |
| Champions | |
| Singles | |
 Dominik Hrbatý[1] | |
| Doubles | |
 Mark Knowles /  Daniel Nestor[2] | |
The 2004 Open 13 was a men's tennis tournament played on indoor hard courts at the Palais des Sports de Marseille in Marseille in France and was part of the International Series of the 2004 ATP Tour. It was the 12th of the tournament and was held from 23 February until 29 February 2004. Unseeded Dominik Hrbatý won the singles title.
- ^ "2004 Marseille – Singles draw". Association of Tennis Professionals (ATP).
- ^ "2004 Marseille – Doubles draw". Association of Tennis Professionals (ATP).