2004 Open 13 – Singles
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Roger Federer was the defending champion but did not compete that year.
Dominik Hrbatý won in the final 4–6, 6–4, 6–4 against Robin Söderling.
Seeds
- Spain Juan Carlos Ferrero (first round)
- Argentina Guillermo Coria (second round)
- Thailand Paradorn Srichaphan (first round)
- Belarus Max Mirnyi (quarterfinals)
- Chile Fernando González (quarterfinals)
- Spain Albert Costa (second round)
- France Arnaud Clément (semifinals)
- Russia Marat Safin (second round)
Draw
Key
- Q = Qualifier
- WC = Wild card
- LL = Lucky loser
- Alt = Alternate
- ITF = ITF entry
- PR = Protected ranking
- SR = Special ranking
- SE = Special exempt
- JE = Junior exempt
- JR = Junior Accelerator Programme entrant
- CO = College Accelerator Programme entrant
- NG = Next Gen Accelerator Program entrant
- w/o = Walkover
- r = Retired
- d = Defaulted
Finals
| Semifinals | Final | ||||||||||||
| Sweden Robin Söderling | 6 | 6 | |||||||||||
| 7 | France Arnaud Clément | 3 | 3 | ||||||||||
| Sweden Robin Söderling | 6 | 4 | 4 | ||||||||||
| Slovakia Dominik Hrbatý | 4 | 6 | 6 | ||||||||||
| Slovakia Dominik Hrbatý | 711 | 6 | |||||||||||
| Sweden Jonas Björkman | 69 | 3 |
Top half
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | Spain J C Ferrero | 62 | 77 | 3 | |||||||||||||||||||||||
| France G Carraz | 77 | 63 | 6 | France G Carraz | 3 | 4 | |||||||||||||||||||||
| SE | Sweden T Enqvist | 64 | 61 | Sweden R Söderling | 6 | 6 | |||||||||||||||||||||
| Sweden R Söderling | 77 | 77 | Sweden R Söderling | 77 | 6 | ||||||||||||||||||||||
| Finland J Nieminen | 4 | 6 | 77 | 5 | Chile F González | 65 | 3 | ||||||||||||||||||||
| France N Escudé | 6 | 4 | 62 | Finland J Nieminen | 2 | 3 | |||||||||||||||||||||
| Slovakia K Kučera | 6 | 65 | r | 5 | Chile F González | 6 | 6 | ||||||||||||||||||||
| 5 | Chile F González | 4 | 77 | Sweden R Söderling | 6 | 6 | |||||||||||||||||||||
| 3 | Thailand P Srichaphan | 6 | 3 | 2 | 7 | France A Clément | 3 | 3 | |||||||||||||||||||
| Spain A Martín | 1 | 6 | 6 | Spain A Martín | 6 | 6 | |||||||||||||||||||||
| Armenia S Sargsian | 7 | 77 | Armenia S Sargsian | 3 | 3 | ||||||||||||||||||||||
| France F Santoro | 5 | 64 | Spain A Martín | 3 | 2 | ||||||||||||||||||||||
| Belgium O Rochus | 3 | 77 | 6 | 7 | France A Clément | 6 | 6 | ||||||||||||||||||||
| Slovakia K Beck | 6 | 65 | 1 | Belgium O Rochus | 68 | 61 | |||||||||||||||||||||
| Croatia G Ivanišević | 2 | 77 | 4 | 7 | France A Clément | 710 | 77 | ||||||||||||||||||||
| 7 | France A Clément | 6 | 64 | 6 |
Bottom half
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | Spain A Costa | 78 | 77 | ||||||||||||||||||||||||
| Morocco H Arazi | 66 | 62 | 6 | Spain A Costa | 5 | 6 | 65 | ||||||||||||||||||||
| Slovakia D Hrbatý | 6 | 7 | Slovakia D Hrbatý | 7 | 4 | 77 | |||||||||||||||||||||
| Q | France N Mahut | 3 | 5 | Slovakia D Hrbatý | 6 | 712 | |||||||||||||||||||||
| WC | France C Saulnier | 6 | 6 | 4 | Belarus M Mirnyi | 3 | 610 | ||||||||||||||||||||
| Q | Austria J Knowle | 1 | 3 | WC | France C Saulnier | 4 | 4 | ||||||||||||||||||||
| Romania A Pavel | 6 | 65 | 2 | 4 | Belarus M Mirnyi | 6 | 6 | ||||||||||||||||||||
| 4 | Belarus M Mirnyi | 4 | 77 | 6 | Slovakia D Hrbatý | 711 | 6 | ||||||||||||||||||||
| WC/8 | Russia M Safin | 6 | 6 | Sweden J Björkman | 69 | 3 | |||||||||||||||||||||
| Q | Germany F Mayer | 3 | 4 | WC/8 | Russia M Safin | 65 | 5 | ||||||||||||||||||||
| Sweden J Björkman | 7 | 6 | Sweden J Björkman | 77 | 7 | ||||||||||||||||||||||
| Netherlands R Sluiter | 5 | 3 | Sweden J Björkman | 7 | 6 | ||||||||||||||||||||||
| Italy D Sanguinetti | 1 | 64 | Q | Switzerland M Rosset | 5 | 3 | |||||||||||||||||||||
| Q | Switzerland M Rosset | 6 | 77 | Q | Switzerland M Rosset | 77 | 6 | ||||||||||||||||||||
| Russia N Davydenko | 62 | 3 | WC/2 | Argentina G Coria | 62 | 1 | |||||||||||||||||||||
| WC/2 | Argentina G Coria | 77 | 6 |