title: 2005 ATP Buenos Aires – Singles
text: # 2005 ATP Buenos Aires – Singles
  
  Gastón Gaudio defeated Mariano Puerta 6–4, 6–4 to win the 2005 ATP Buenos Aires singles competition. Guillermo Coria was the champion but did not defend his title.
  
  ## Seeds
  
  * Carlos Moyà (quarterfinals)
  * Gastón Gaudio (champion)
  * Guillermo Cañas (second round)
  * Fernando González (withdrew)
  * Juan Ignacio Chela (first round)
  * Filippo Volandri (first round)
  * Rafael Nadal (quarterfinals)
  * Mariano Zabaleta (second round)
  
  ## 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 |
  | - | - | - | - | - | - | - | - |
  | WC | Mariano Puerta | 6 | $7^7$ | | | | |
  | | José Acasuso | 4 | $6^5$ | | | | |
  | | José Acasuso | 4 | $6^5$ | WC | Mariano Puerta | 4 | 4 |
  | | | | | 2 | Gastón Gaudio | 6 | 6 |
  | | Alberto Martín | 3 | 4 | 2 | Gastón Gaudio | 6 | 6 |
  | 2 | Gastón Gaudio | 6 | 6 | | | | |
  
  ### Top half
  
  | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
  | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
  | 1 | C Moyà | 6 | $7^7$ | | | | | | | | | | | | | |
  | Q | P Luczak | 3 | $6^5$ | 1 | C Moyà | 6 | 6 | | | | | | | | | |
  | | Á Costa | 5 | 4 | | J Mónaco | 1 | 2 | | | | | | | | | |
  | | J Mónaco | 7 | 6 | | | | | | 1 | C Moyà | $6^0$ | 3 | | | | |
  | Q | J-P Guzmán | 2 | $6^2$ | | | | | | WC | M Puerta | $7^7$ | 6 | | | | |
  | WC | M Puerta | 6 | $7^7$ | WC | M Puerta | 6 | 6 | | | | | | | | | |
  | | L Burgsmüller | 6 | 6 | | L Burgsmüller | 2 | 0 | | | | | | | | | |
  | 6 | F Volandri | 4 | 2 | | | | | | | | | | WC | M Puerta | 6 | $7^7$ |
  | LL | G García López | 6 | 6 | | | | | | | | | | | J Acasuso | 4 | $6^5$ |
  | | D Sánchez | 4 | 3 | LL | G García López | 4 | 3 | | | | | | | | | |
  | | J Acasuso | 6 | 6 | | J Acasuso | 6 | 6 | | | | | | | | | |
  | | P-H Mathieu | 3 | 2 | | | | | | | J Acasuso | 6 | 6 | | | | |
  | | S Ventura | 3 | 3 | | | | | | | N Almagro | 3 | 4 | | | | |
  | | N Almagro | 6 | 6 | | N Almagro | $6^4$ | 6 | 6 | | | | | | | | |
  | | Á Calatrava | 3 | 2 | 8 | M Zabaleta | $7^7$ | 4 | 4 | | | | | | | | |
  | 8 | M Zabaleta | 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 | Semifinals |
  | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
  | 5 | J I Chela | 5 | 1 | | | | | | | | | | | | | | | |
  | Q | M López | 7 | 6 | | Q | M López | 6 | $6^5$ | $6^4$ | | | | | | | | | |
  | | F Mantilla | 6 | $7^7$ | | | F Mantilla | 4 | $7^7$ | $7^7$ | | | | | | | | | |
  | | Ó Hernández | 4 | $6^0$ | | | | | | | | F Mantilla | 7 | 4 | $6^3$ | | | | |
  | | D Ferrer | $0^r$ | | | | | | | | | A Martín | 5 | 6 | $7^7$ | | | | |
  | | A Martín | 5 | | | | A Martín | 6 | 6 | | | | | | | | | | |
  | | À Corretja | 3 | 1 | | 3 | G Cañas | 4 | 3 | | | | | | | | | | |
  | 3 | G Cañas | 6 | 6 | | | | | | | | | | | | | A Martín | 3 | 4 |
  | WC/7 | R Nadal | $7^7$ | 6 | | | | | | | | | | | | 2 | G Gaudio | 6 | 6 |
  | | A Calleri | $6^2$ | 3 | | WC/7 | R Nadal | 6 | 6 | | | | | | | | | | |
  | WC | E Massa | $6^5$ | 0 | | | P Starace | 1 | 3 | | | | | | | | | | |
  | | P Starace | $7^7$ | 6 | | | | | | | WC/7 | R Nadal | 6 | 0 | 1 | | | | |
  | | Montañés | 3 | 6 | 2 | | | | | | 2 | G Gaudio | 0 | 6 | 6 | | | | |
  | | F Saretta | 6 | 0 | 6 | | F Saretta | 3 | 2 | | | | | | | | | | |
  | Q | F Luzzi | 6 | 1 | 3 | 2 | G Gaudio | 6 | 6 | | | | | | | | | | |
  | 2 | G Gaudio | 2 | 6 | 6 | | | | | | | | | | | | | | |
  