# 2004 Estoril Open – Men's singles

Nikolay Davydenko was the defending champion but lost in the first round to Radek Štěpánek.
Juan Ignacio Chela won in the final 6–7$^{(2–7)}$, 6–3, 6–3 against Marat Safin.

## Seeds

* Rainer Schüttler (first round)
* Nicolás Massú (first round)
* Agustín Calleri (first round)
* Tommy Robredo (quarterfinals)
* Juan Ignacio Chela (champion)
* Max Mirnyi (second round)
* Gastón Gaudio (first round)
* Marat Safin (final)

## 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 | Final |
| Q | Florian Mayer | 3 | 3 | | | | | |
| 5 | Juan Ignacio Chela | 6 | 6 | | | | | |
| 5 | Juan Ignacio Chela | 6 | 6 | 5 | Juan Ignacio Chela | 6$^2$ | 6 | 6 |
| | | | | 8 | Marat Safin | 7$^7$ | 3 | 3 |
| 8 | Marat Safin | 2 | | 8 | Marat Safin | 7$^7$ | 3 | 3 |
| | Irakli Labadze | 3$^r$ | | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | R Schüttler | 6$^4$ | 7$^7$ | 3 | | | | | | | | | | | | |
| | V Hănescu | 7$^7$ | 6$^4$ | 6 | | V Hănescu | 6 | 6 | | | | | | | | |
| | O Rochus | 6 | 7 | | | O Rochus | 3 | 0 | | | | | | | | |
| | G Carraz | 4 | 5 | | | | | | | V Hănescu | 4 | 3 | | | | |
| | R Štěpánek | 7$^7$ | 6 | | | | | | Q | F Mayer | 6 | 6 | | | | |
| | N Davydenko | 6$^3$ | 3 | | | R Štěpánek | 4 | 2 | | | | | | | | |
| Q | F Mayer | 6 | 6 | | Q | F Mayer | 6 | 6 | | | | | | | | |
| 7 | G Gaudio | 3 | 4 | | | | | | | | | | Q | F Mayer | 3 | 3 |
| 3 | A Calleri | 6$^3$ | 6 | 6$^3$ | | | | | | | | | 5 | J I Chela | 6 | 6 |
| Q | J Vaněk | 7$^7$ | 3 | 7$^7$ | Q | J Vaněk | 3 | 2 | | | | | | | | |
| | J Boutter | 6 | 2 | 4 | | O Patience | 6 | 6 | | | | | | | | |
| | O Patience | 3 | 6 | 6 | | | | | | O Patience | 3 | 2 | | | | |
| WC | D Rocha | 7 | 2 | 6 | | | | | 5 | J I Chela | 6 | 6 | | | | |
| WC | L Tavares | 5 | 6 | 3 | WC | D Rocha | 0 | 0$^r$ | | | | | | | | |
| WC | G Cañas | 3 | 4 | | 5 | J I Chela | 6 | 2 | | | | | | | | |
| 5 | J I Chela | 6 | 6 | | | | | | | | | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 8 | M Safin | 5 | 6 | 6 | | | | | | | | | | | | | |
| | C Saulnier | 7 | 2 | 2 | 8 | M Safin | 6 | 6 | | | | | | | | | |
| | A Dupuis | 6$^5$ | 0 | | | T Ascione | 4 | 4 | | | | | | | | | |
| | T Ascione | 7$^7$ | 6 | | | | | | | 8 | M Safin | 7$^7$ | 2 | 7$^7$ | | | |
| Q | V Mazarakis | 6 | 1 | 2 | | | | | | 4 | T Robredo | 6$^2$ | 6 | 6$^5$ | | | |
| | M Zabaleta | 3 | 6 | 6 | | M Zabaleta | 1 | 6$^6$ | | | | | | | | | |
| | X Malisse | 0 | 0$^r$ | | 4 | T Robredo | 6 | 7$^8$ | | | | | | | | | |
| 4 | T Robredo | 6 | 0 | | | | | | | | | | | | 8 | M Safin | 2 |
| 6 | M Mirnyi | 7$^7$ | 6 | | | | | | | | | | | | | I Labadze | 3$^r$ |
| | B Ulihrach | 6$^2$ | 3 | | 6 | M Mirnyi | 3 | 3 | | | | | | | | | |
| Q | A Sávolt | 6 | 4 | 5 | | I Labadze | 6 | 6 | | | | | | | | | |
| | I Labadze | 4 | 6 | 7 | | | | | | | I Labadze | w/o | | | | | |
| | G Ivanišević | 4 | 1 | | | | | | | | R Nadal | | | | | | |
| | R Nadal | 6 | 6 | | | R Nadal | 6 | 3 | 6 | | | | | | | | |
| | R Gasquet | 0 | 7$^7$ | 7$^7$ | | R Gasquet | 4 | 6 | 2 | | | | | | | | |
| 2 | N Massú | 6 | 6$^2$ | 6$^5$ | | | | | | | | | | | | | |