Open Seat Godó Barcelona 2004
Spain - 26 April 2004 - 2 May 2004 - Clay
 Fernando González | def. |  Mariano Zabaleta | 7-6 (2), 3-6, 6-2 |
| Tommy Robredo | def. | Fernando Verdasco | 6-4, 5-7, 6-4 |
| David Nalbandian | def. | Marc López | 6-4, 6-4 |
 Kristof Vliegen | def. |  Olivier Patience | 6-3, 6-4 |
| Agustin Calleri | def. | Feliciano López | 6-3, 7-5 |
| Albert Montañés | def. | Alberto Martín Magret | 6-3, 6-2 |
 Gustavo Kuerten | def. | Guillermo Cañas | 6-3, 6-7 (1), 6-3 |
| Gaston Gaudio | def. | Carlos Moyá | 6-4, 6-4 |
| Fernando González | def. |  Nicolas Lapentti | 7-6 (1), 6-0 |
| Mariano Zabaleta | def. | Fernando Vicente | 6-0, 6-3 |
| Fernando Verdasco | def. |  Peter Luczak | 5-1, abandon |
| Tommy Robredo | def. |  Karol Beck | 6-4, 6-4 |
| David Nalbandian | def. |  Todd Martin | 6-2, 6-4 |
| Marc López | def. | Felix Mantilla | 6-4, 7-6 (4) |
| Kristof Vliegen | def. | Flavio Saretta | 6-2, 1-6, 6-3 |
| Olivier Patience | def. | Juan Ignacio Chela | 1-6, 6-4, 6-4 |
| Agustin Calleri | def. |  Tomás Berdych | 6-1, 7-6 (7) |
| Feliciano López | def. | David Sánchez | 6-3, 2-6, 6-4 |
| Albert Montañés | def. | Nicolas Almagro | 3-6, 6-2, 6-2 |
| Alberto Martín Magret | def. | Nicolas Massu | 6-3, 5-7, 6-2 |
| Gustavo Kuerten | def. |  Thomas Johansson | 7-6 (5), 4-6, 7-6 (5) |
| Guillermo Cañas | def. |  Mario Ancic | 6-4, 6-4 |
| Gaston Gaudio | def. |  Alexander Popp | 6-0, 7-6 (4) |
| Carlos Moyá | def. | Daniel Elsner | 6-4, 6-2 |
| Fernando González | | | Bye |
| Nicolas Lapentti | def. |  Jürgen Melzer | 7-5, 6-1 |
| Fernando Vicente | def. | Ivo Karlovic | 6-4, 6-4 |
| Mariano Zabaleta | def. |  Massimo Dell''Acqua | 6-1, 6-4 |
| Peter Luczak | def. | Óscar Hernández | 7-5, 6-3 |
| Fernando Verdasco | def. | Nicolas Mahut | 6-2, 6-3 |
| Karol Beck | def. |  John Van Lottum | 7-6 (2), abandon |
| David Nalbandian | | | Bye |
| Todd Martin | def. | David Ferrer | 6-4, 6-7 (8), 6-4 |
| Marc López | def. |  Igor Andreev | 7-6 (5), 3-6, 7-6 (3) |
| Felix Mantilla | def. |  Stanislas Wawrinka | 7-6 (2), 6-0 |
| Flavio Saretta | def. | Iván Navarro Pastor | 4-6, 7-5, 6-4 |
| Kristof Vliegen | def. | Stefan Koubek | 6-4, 6-2 |
| Olivier Patience | def. | Davide Sanguinetti | 6-7 (1), 6-4, 6-3 |
| Agustin Calleri | | | Bye |
| Tomás Berdych | def. | Galo Blanco | 6-3, 6-1 |
| David Sánchez | def. | Dmitry Tursunov | 6-2, 6-4 |
| Feliciano López | def. | Jan-Michael Gambill | 7-5, 7-5 |
| Albert Montañés | def. | Albert Costa | 6-4, 7-6 (3) |
| Nicolas Almagro | def. | Alex Corretja | 3-6, 6-3, 6-4 |
| Alberto Martín Magret | def. | José Acasuso | 6-1, 1-2, abandon |
| Gustavo Kuerten | | | Bye |
| Thomas Johansson | def. | Didac Pérez | 7-5, 6-3 |
| Guillermo Cañas | def. |  Juan Antonio Marín | 6-4, 6-2 |
| Mario Ancic | def. | Dominik Hrbaty | 6-7 (3), 7-6 (5), 7-5 |
| Gaston Gaudio | def. | Raemon Sluiter | 6-3, 6-3 |
| Alexander Popp | def. | Albert Portas | 6-4, 6-2 |
| Daniel Elsner | def. | Ruben Ramirez Hidalgo | 6-4, 1-6, 7-6 (5) |
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