# 2004 Idea Prokom Open – Men's singles

Rafael Nadal defeated José Acasuso in the final, 6–3, 6–4 to win the Singles title at the 2004 Idea Prokom Open. It was his first career title.
Guillermo Coria was the reigning champion, but did not participate.

## Seeds

* Marat Safin (second round)
* Nikolay Davydenko (first round)
* David Ferrer (second round)
* Igor Andreev (first round)
* Alberto Martín (first round)
* Rafael Nadal (champion)
* Albert Montañés (first round)
* Paul-Henri Mathieu (first round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| | Juan Mónaco | 4 | 2 | | | | |
| | José Acasuso | 6 | 6 | | | | |
| | José Acasuso | 6 | 6 | | José Acasuso | 3 | 4 |
| | | | | 6 | Rafael Nadal | 6 | 6 |
| 6 | Rafael Nadal | 7 | 6 | 6 | Rafael Nadal | 6 | 6 |
| Q | Félix Mantilla | 5 | 1 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 1 | M Safin | 7 | 6 | | | | | | | | | | | | | |
| | G Blanco | 5 | 2 | | 1 | M Safin | 3 | 2 | | | | | | | | |
| | M López | 7 | 6 | | | M López | 6 | 6 | | | | | | | | |
| | Ó Hernández | 5 | 2 | | | | | | | M López | 3 | 6 | 6$^6$ | | | |
| WC | F Urban | 4 | 6$^6$ | | | | | | | J Mónaco | 6 | 2 | 7$^8$ | | | |
| | M Rosset | 6 | 7$^8$ | | | M Rosset | 4 | 3 | | | | | | | | |
| | J Mónaco | 6$^{13}$ | 7 | 6 | | J Mónaco | 6 | 6 | | | | | | | | |
| 5 | A Martín | 7$^{15}$ | 5 | 3 | | | | | | | | | | J Mónaco | 4 | 2 |
| 3 | D Ferrer | 6 | 6 | | | | | | | | | | | J Acasuso | 6 | 6 |
| Q | G García-López | 4 | 3 | | 3 | D Ferrer | 4 | 6$^4$ | | | | | | | | |
| WC | M Przysiężny | 5 | 4 | | | J Acasuso | 6 | 7$^7$ | | | | | | | | |
| | J Acasuso | 7 | 6 | | | | | | | J Acasuso | 3 | 6 | 6 | | | |
| | B Ulihrach | 6 | 2 | 6$^5$ | | | | | Q | J Vaněk | 6 | 3 | 2 | | | |
| Q | J Vaněk | 2 | 6 | 7$^7$ | Q | J Vaněk | 6 | 6 | | | | | | | | |
| | S Koubek | 3 | 6 | 6 | | S Koubek | 4 | 4 | | | | | | | | |
| 8 | P-H Mathieu | 6 | 1 | 3 | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | R Nadal | 6 | 6 | | | | | | | | | | | | | | |
| | V Hănescu | 4 | 4 | | 6 | R Nadal | 6 | 6 | | | | | | | | | |
| | Á Calatrava | 4 | 6 | 4 | PR | A Di Pasquale | 2 | 4 | | | | | | | | | |
| PR | A Di Pasquale | 6 | 3 | 6 | | | | | | 6 | R Nadal | 6 | 6 | | | | |
| | T Zíb | 4 | 2 | | | | | | | Q | F Squillari | 3 | 4 | | | | |
| Q | F Squillari | 6 | 6 | | Q | F Squillari | 6 | 6 | | | | | | | | | |
| WC | Ł Kubot | 6 | 6 | | WC | Ł Kubot | 2 | 3 | | | | | | | | | |
| 4 | I Andreev | 4 | 2 | | | | | | | | | | | 6 | R Nadal | 7 | 6 |
| 7 | A Montañés | 0 | 2 | | | | | | | | | | | Q | F Mantilla | 5 | 1 |
| Q | F Mantilla | 6 | 6 | | Q | F Mantilla | 5 | 7 | 7 | | | | | | | | |
| | A Portas | 6 | 6 | | | A Portas | 7 | 5 | 5 | | | | | | | | |
| | M Vassallo Argüello | 1 | 2 | | | | | | | Q | F Mantilla | 6 | 6 | | | | |
| | O Mutis | 6 | 6 | | | | | | | | A García | 3 | 3 | | | | |
| | R Ramírez Hidalgo | 4 | 3 | | | O Mutis | 2 | 6$^9$ | | | | | | | | | |
| | A García | 3 | 7$^7$ | 6 | | A García | 6 | 7$^{11}$ | | | | | | | | | |
| 2 | N Davydenko | 6 | 6$^5$ | 4 | | | | | | | | | | | | | |