# 2005 Copa Petrobras Santiago – Singles

Óscar Hernández was the defending champion, but lost in semifinals to Rubén Ramírez Hidalgo.
Júlio Silva defeated Rubén Ramírez Hidalgo 6–2, 6–3 in the final.

## Seeds

* Fernando Vicente (second round)
* Óscar Hernández (semifinals)
* Carlos Berlocq (withdrew due to a right shoulder injury)
* Flávio Saretta (first round)
* Boris Pašanski (quarterfinals)
* Oliver Marach (second round)
* Juan Antonio Marín (quarterfinals)
* Rubén Ramírez Hidalgo (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 |
| | Júlio Silva | 6 | 6 | | | | |
| Q | Máximo González | 2 | 1 | | | | |
| Q | Máximo González | 2 | 1 | | Júlio Silva | 6 | 6 |
| | | | | 8 | Rubén Ramírez Hidalgo | 2 | 3 |
| 8 | Rubén Ramírez Hidalgo | 6 | 6 | 8 | Rubén Ramírez Hidalgo | 2 | 3 |
| 2 | Óscar Hernández | 3 | 3 | | | | |

### 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 | F Vicente | 6 | 7$^7$ | | | | | | | | | | | | | | | |
| WC | F Parada | 2 | 6$^5$ | | 1 | F Vicente | 4 | 7 | 1 | | | | | | | | | |
| | J Silva | 3 | 6 | 7$^7$ | | J Silva | 6 | 5 | 6 | | | | | | | | | |
| | G Lapentti | 6 | 3 | 6$^5$ | | | | | | | J Silva | 6 | 6 | | | | | |
| | F Luzzi | 6 | 6 | | | | | | | 5 | B Pašanski | 3 | 4 | | | | | |
| Q | G Moraru | 3 | 3 | | | F Luzzi | 2 | 6 | 3 | | | | | | | | | |
| | S Ventura | 4 | 4 | | 5 | B Pašanski | 6 | 3 | 6 | | | | | | | | | |
| 5 | B Pašanski | 6 | 6 | | | | | | | | | | | | | J Silva | 6 | 6 |
| Q | F Fognini | 6 | 6 | | | | | | | | | | | | Q | M González | 2 | 1 |
| WC | J Aguilar | 3 | 4 | | Q | F Fognini | 5 | 6 | 2 | | | | | | | | | |
| Q | M González | 7 | 6 | | Q | M González | 7 | 2 | 6 | | | | | | | | | |
| | H Armando | 5 | 3 | | | | | | | Q | M González | 3 | 6 | 6 | | | | |
| | D Hartfield | 6 | 6 | | | | | | | | D Hartfield | 6 | 4 | 3 | | | | |
| LL | A Cruciat | 3 | 3 | | | D Hartfield | 6 | 4 | 6 | | | | | | | | | |
| LL | A Simoni | 4 | 6$^4$ | | 6 | O Marach | 2 | 6 | 4 | | | | | | | | | |
| 6 | O Marach | 6 | 7$^7$ | | | | | | | | | | | | | | | |

### 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 |
| 8 | R Ramírez Hidalgo | 6 | 5 | 6 | | | | | | | | | | | | | | |
| | JM del Potro | 2 | 7 | 1 | 8 | R Ramírez Hidalgo | 6 | 7 | | | | | | | | | | |
| WC | M Melo | 2 | 4 | | | S Roitman | 0 | 5 | | | | | | | | | | |
| | S Roitman | 6 | 6 | | | | | | | 8 | R Ramírez Hidalgo | 6$^3$ | 6 | 6 | | | | |
| | T Alves | 6 | 6 | | | | | | | | D Gimeno Traver | 7$^7$ | 3 | 4 | | | | |
| | S González | 1 | 4 | | | T Alves | 3 | 2 | | | | | | | | | | |
| | D Gimeno Traver | 7 | 6 | | | D Gimeno Traver | 6 | 6 | | | | | | | | | | |
| 4 | F Saretta | 5 | 2 | | | | | | | | | | | | 8 | R Ramírez Hidalgo | 6 | 6 |
| 7 | JA Marín | 5 | 6 | 6 | | | | | | | | | | | 2 | Ó Hernández | 3 | 3 |
| Q | JM Aranguren | 7 | 3 | 0 | 7 | JA Marín | 6 | 6 | | | | | | | | | | |
| | D Vemić | 6 | 6 | | | D Vemić | 4 | 4 | | | | | | | | | | |
| | A García | 1 | 2 | | | | | | | 7 | JA Marín | 3 | 6 | 3 | | | | |
| | P Capdeville | 4 | 4 | | | | | | | 2 | Ó Hernández | 6 | 4 | 6 | | | | |
| WC | B Rosa | 6 | 6 | | WC | B Rosa | 6 | 2 | 2 | | | | | | | | | |
| | D Köllerer | 4 | 3 | | 2 | Ó Hernández | 3 | 6 | 6 | | | | | | | | | |
| 2 | Ó Hernández | 6 | 6 | | | | | | | | | | | | | | | |