# 2004 Campionati Internazionali di Sicilia – Singles

Nicolás Massú was the defending champion, but lost in the quarterfinals to Filippo Volandri.
Tomáš Berdych won the title by defeating Volandri 6–3, 6–3 in the final.

## Seeds

* Nicolás Massú (quarterfinals)
* Florian Mayer (withdrew due to an arm injury)
* Fernando Verdasco (second round)
* Nikolay Davydenko (quarterfinals)
* Filippo Volandri (final)
* Rafael Nadal (second round)
* David Ferrer (semifinals)
* Tomáš Berdych (champion)

## 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 |
| 5 | Filippo Volandri | 6 | 6 | | | | |
| | Juan Mónaco | 1 | 4 | | | | |
| | Juan Mónaco | 1 | 4 | 5 | Filippo Volandri | 3 | 3 |
| | | | | 8 | Tomáš Berdych | 6 | 6 |
| 7 | David Ferrer | 5 | 4 | 8 | Tomáš Berdych | 6 | 6 |
| 8 | Tomáš Berdych | 7 | 6 | | | | |

### Top 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 | Semifinals |
| 1 | N Massú | 6 | 6 | | | | | | | | | | | | | | | |
| | D Sánchez | 3 | 2 | | 1 | N Massú | 4 | | | | | | | | | | | |
| | P Starace | 7$^8$ | 4 | 6 | | P Starace | 1$^r$ | | | | | | | | | | | |
| | R Gasquet | 6$^6$ | 6 | 1 | | | | | | 1 | N Massú | 3 | 6 | 4 | | | | |
| Q | G Blanco | 2 | 6 | 6 | | | | | | 5 | F Volandri | 6 | 3 | 6 | | | | |
| Q | A di Mauro | 6 | 2 | 2 | Q | G Blanco | 2 | 1 | | | | | | | | | | |
| | A Montañés | 2 | 3 | | 5 | F Volandri | 6 | 6 | | | | | | | | | | |
| 5 | F Volandri | 6 | 6 | | | | | | | | | | | | 5 | F Volandri | 6 | 6 |
| 3 | F Verdasco | 6 | 4 | 6 | | | | | | | | | | | | J Mónaco | 1 | 4 |
| WC | F Aldi | 2 | 6 | 2 | 3 | F Verdasco | 4 | 7 | 3 | | | | | | | | | |
| | J Mónaco | 3 | 6 | | | J Mónaco | 6 | 5 | 6 | | | | | | | | | |
| | P Kohlschreiber | 6 | 4$^r$ | | | | | | | | J Mónaco | 6 | 6 | | | | | |
| | O Mutis | 6 | 6 | | | | | | | | O Mutis | 3 | 2 | | | | | |
| | O Patience | 4 | 3 | | | O Mutis | 6 | 6 | | | | | | | | | | |
| Q | N Almagro | 1 | 5 | | 6/WC | R Nadal | 3 | 3 | | | | | | | | | | |
| 6/WC | R Nadal | 6 | 7 | | | | | | | | | | | | | | | |

### 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 | Semifinals |
| 7 | D Ferrer | 2 | 6 | 6 | | | | | | | | | | | | | | |
| | A Martín | 6 | 1 | 4 | 7 | D Ferrer | 3 | 7$^7$ | 6 | | | | | | | | | |
| | D Elsner | 1 | 0 | | | Á Calatrava | 6 | 6$^2$ | 2 | | | | | | | | | |
| | Á Calatrava | 6 | 6 | | | | | | | 7 | D Ferrer | 6 | 2 | 6 | | | | |
| | M López | 6 | 6 | | | | | | | 4 | N Davydenko | 2 | 6 | 4 | | | | |
| LL | D Gimeno Traver | 2 | 2 | | | M López | 1 | 4 | | | | | | | | | | |
| | V Hănescu | 2 | 5 | | 4 | N Davydenko | 6 | 6 | | | | | | | | | | |
| 4 | N Davydenko | 6 | 7 | | | | | | | | | | | | 7 | D Ferrer | 5 | 4 |
| 8 | T Berdych | 6$^5$ | 6 | 6 | | | | | | | | | | | 8 | T Berdych | 7 | 6 |
| | Ó Hernández | 7$^7$ | 3 | 3 | 8 | T Berdych | 4 | 7 | 6 | | | | | | | | | |
| | J Acasuso | 6 | 6 | | | J Acasuso | 6 | 5 | 4 | | | | | | | | | |
| | A Falla | 3 | 1 | | | | | | | 8 | T Berdych | 6 | 6 | | | | | |
| WC | A Seppi | 6$^2$ | 6 | 6 | | | | | | WC | A Seppi | 2 | 4 | | | | | |
| | A Di Pasquale | 7$^7$ | 2 | 4 | WC | A Seppi | 6 | 3 | 4 | | | | | | | | | |
| | K Vliegen | 6 | 6 | | | K Vliegen | 4 | 6 | 1$^r$ | | | | | | | | | |
| Q | M Puerta | 1 | 2 | | | | | | | | | | | | | | | |