# 2005 Brasil Open – Singles

Gustavo Kuerten was the defending champion, but chose not to participate that year.
Rafael Nadal won in the final 6–0, 6–7$^{(2–7)}$, 6–1, against Alberto Martín.

## Seeds

* Gastón Gaudio (withdrew due to an athletic pubalgia)
* Fernando González (first round)
* Juan Ignacio Chela (second round)
* Filippo Volandri (first round, retired because of a flu)
* David Ferrer (first round, retired because of a flu)
* Rafael Nadal (champion)
* Mariano Zabaleta (quarterfinals)
* Albert Costa (second round)
* Ricardo Mello (semifinals)

## 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 | Final |
| 9 | Ricardo Mello | 6 | 2 | 4 | | | | | |
| 6 | Rafael Nadal | 2 | 6 | 6 | | | | | |
| 6 | Rafael Nadal | 2 | 6 | 6 | 6 | Rafael Nadal | 6 | 6$^2$ | 6 |
| | | | | | | Alberto Martín | 0 | 7$^7$ | 1 |
| | Alberto Martín | 6 | 6 | | | Alberto Martín | 0 | 7$^7$ | 1 |
| Q | Peter Luczak | 2 | 3 | | | | | | |

### 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 | Semifinals | Semifinals |
| 9 | R Mello | 3 | 6 | 6 | | | | | | | | | | | | | | |
| | A Montañés | 6 | 4 | 4 | 9 | R Mello | 6 | 1 | | | | | | | | | | |
| | F Mantilla | 6$^1$ | 6 | 3 | Q | M Vassallo Argüello | 3 | 0$^r$ | | | | | | | | | | |
| Q | M Vassallo Argüello | 7$^7$ | 4 | 6 | | | | | 9 | R Mello | 7 | 6 | | | | | | |
| | S Ventura | 4 | 6 | 6 | | | | | | S Ventura | 5 | 1 | | | | | | |
| | N Almagro | 6 | 4 | 1 | | S Ventura | 6 | 6 | | | | | | | | | | |
| WC | À Corretja | 0 | 7 | | WC | À Corretja | 4 | 4 | | | | | | | | | | |
| 5 | D Ferrer | 6 | 5 | r | | | | | | | | | | 9 | R Mello | 6 | 2 | 4 |
| 3 | JI Chela | 6 | 6 | | | | | | | | | | | 6 | R Nadal | 2 | 6 | 6 |
| | L Burgsmüller | 4 | 0 | | 3 | JI Chela | 6$^2$ | 1 | | | | | | | | | | |
| | P Starace | 1 | 1 | | | A Calleri | 7$^7$ | 6 | | | | | | | | | | |
| | A Calleri | 6 | 6 | | | | | | | A Calleri | 2 | 7$^7$ | 4 | | | | | |
| Q | JA Marín | 3 | 4 | | | | | | 6 | R Nadal | 6 | 6$^5$ | 6 | | | | | |
| | Á Calatrava | 6 | 6 | | | Á Calatrava | 3 | 3 | | | | | | | | | | |
| | J Acasuso | 6$^1$ | 3 | | 6 | R Nadal | 6 | 6 | | | | | | | | | | |
| 6 | R Nadal | 7$^7$ | 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 |
| 7 | M Zabaleta | 6 | 6 | | | | | | | | | | | | | | | |
| SE | M Puerta | 4 | 2 | | 7 | M Zabaleta | 6 | 6 | | | | | | | | | | |
| LL | G García López | 6 | 6 | | LL | G García López | 2 | 2 | | | | | | | | | | |
| | J Mónaco | 1 | 3 | | | | | | | 7 | M Zabaleta | 6$^6$ | 4 | | | | | |
| | D Sánchez | 4 | 0 | | | | | | | | A Martín | 7$^8$ | 6 | | | | | |
| | PH Mathieu | 6 | 6 | | | PH Mathieu | 2 | 5 | | | | | | | | | | |
| | A Martín | 7 | 1 | | | A Martín | 6 | 7 | | | | | | | | | | |
| 4 | F Volandri | 5 | 0$^r$ | | | | | | | | | | | | | A Martín | 6 | 6 |
| 8 | A Costa | 7$^7$ | 4 | 4 | | | | | | | | | | | Q | P Luczak | 2 | 3 |
| | Ó Hernández | 6$^2$ | 6 | 4$^r$ | 8 | A Costa | 7$^7$ | 1 | 6$^7$ | | | | | | | | | |
| | F Saretta | 3 | 1 | | Q | E Massa | 6$^3$ | 6 | 7$^9$ | | | | | | | | | |
| Q | E Massa | 6 | 6 | | | | | | | Q | E Massa | 6 | 5 | 1 | | | | |
| WC | J Silva | 2 | 4 | | | | | | | Q | P Luczak | 1 | 7 | 6 | | | | |
| WC | A Sá | 6 | 6 | | WC | A Sá | 6 | 3 | 0 | | | | | | | | | |
| Q | P Luczak | 3 | 6 | 7 | Q | P Luczak | 3 | 6 | 6 | | | | | | | | | |
| 2 | F González | 6 | 3 | 5 | | | | | | | | | | | | | | |