# 2004 Copa Petrobras Santiago – Singles

Óscar Hernández defeated Nicolás Lapentti 7–6$^{(7–4)}$, 6–4 in the final.

## Seeds

* Óscar Hernández (champion)
* Flávio Saretta (second round)
* Adrián García (first round)
* Jiří Vaněk (second round)
* Edgardo Massa (second round)
* Franco Squillari (second round, retired due to a back injury)
* André Sá (first round)
* Nicolás Lapentti (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 | Semifinals | Final | Final | Final | Final |
| 1 | Óscar Hernández | 6 | 6 | | | | | |
| | Juan Pablo Guzmán | 4 | 4 | | | | | |
| | Juan Pablo Guzmán | 4 | 4 | | 1 | Óscar Hernández | 7$^7$ | 6 |
| | | | | | 8 | Nicolás Lapentti | 6$^4$ | 4 |
| | Juan Pablo Brzezicki | 7$^7$ | 2 | 0$^r$ | 8 | Nicolás Lapentti | 6$^4$ | 4 |
| 8 | Nicolás Lapentti | 6$^1$ | 6 | 1 | | | | |

### 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 | Ó Hernández | 7 | 6 | | | | | | | | | | | | | | | |
| WC | D Cubas | 5 | 2 | | 1 | Ó Hernández | 3 | 6 | 6 | | | | | | | | | |
| | J Pospíšil | 6 | 3 | 2 | Q | F Vicente | 6 | 3 | 0 | | | | | | | | | |
| Q | F Vicente | 3 | 6 | 6 | | | | | | 1 | Ó Hernández | 6 | 7$^7$ | | | | | |
| | B Dabul | 6 | 6 | | | | | | | | B Dabul | 4 | 6$^3$ | | | | | |
| WC | Em Massa | 4 | 2 | | | B Dabul | 6 | 7$^7$ | | | | | | | | | | |
| Q | Marko Neunteibl | 6 | 1 | 7$^7$ | Q | Marko Neunteibl | 1 | 6$^3$ | | | | | | | | | | |
| 7 | A Sá | 3 | 6 | 6$^2$ | | | | | | | | | | | 1 | Ó Hernández | 6 | 6 |
| 3 | A García | 6 | 3 | 3 | | | | | | | | | | | | JP Guzmán | 4 | 4 |
| | G Moraru | 2 | 6 | 6 | | G Moraru | 1 | 3 | | | | | | | | | | |
| | J Silva | 3 | 7$^7$ | 6 | | J Silva | 6 | 6 | | | | | | | | | | |
| | M Puerta | 6 | 6$^5$ | 2 | | | | | | | J Silva | 4 | 6 | 3 | | | | |
| Q | Francisco Cabello | 2 | 3 | | | | | | | | JP Guzmán | 6 | 4 | 6 | | | | |
| | JP Guzmán | 6 | 6 | | | JP Guzmán | 3 | 7 | 6 | | | | | | | | | |
| | M Daniel | 3 | 6 | 3 | 5 | Ed Massa | 6 | 5 | 3 | | | | | | | | | |
| 5 | Ed Massa | 6 | 3 | 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 | Semifinals | Semifinals |
| 6 | F Squillari | 6 | 6 | | | | | | | | | | | | | | | | |
| | C Berlocq | 2 | 1 | | 6 | F Squillari | 1 | 0$^r$ | | | | | | | | | | | |
| WC | G Hormazábal | 4 | 6 | 3 | WC | J Peralta | 6 | 1 | | | | | | | | | | | |
| WC | J Peralta | 6 | 2 | 6 | | | | | | WC | J Peralta | 4 | 1 | | | | | | |
| | V Ioniță | 6 | 1 | 2 | | | | | | | JP Brzezicki | 6 | 6 | | | | | | |
| | JP Brzezicki | 3 | 6 | 6 | | JP Brzezicki | 6$^5$ | 7$^7$ | 6 | | | | | | | | | | |
| | I González King | 2 | 2 | | 4 | J Vaněk | 7$^7$ | 6$^1$ | 0 | | | | | | | | | | |
| 4 | J Vaněk | 6 | 6 | | | | | | | | | | | | | JP Brzezicki | 7$^7$ | 2 | 0$^r$ |
| 8 | N Lapentti | 2 | 7 | 6 | | | | | | | | | | | 8 | N Lapentti | 6$^1$ | 6 | 1 |
| | O Marach | 6 | 5 | 1 | 8 | N Lapentti | 6 | 6 | | | | | | | | | | | |
| Q | D Moyano | 6 | 2 | 1 | | J Ager | 3 | 4 | | | | | | | | | | | |
| | J Ager | 4 | 6 | 6 | | | | | | 8 | N Lapentti | 6 | 6$^5$ | 6 | | | | | |
| | C Villagrán | 6 | 1 | 6 | | | | | | | C Villagrán | 2 | 7$^7$ | 2 | | | | | |
| | F Ferreiro | 2 | 6 | 4 | | C Villagrán | 6 | 6 | | | | | | | | | | | |
| | H Gamonal | 4 | 2 | | 2 | F Saretta | 4 | 4 | | | | | | | | | | | |
| 2 | F Saretta | 6 | 6 | | | | | | | | | | | | | | | | |
* Draw source