# 2003 Copa AT&T – Singles

Nicolás Massú was the defending champion but lost in the first round to Agustín Calleri.
Carlos Moyà won in the final 6–3, 4–6, 6–4 against Guillermo Coria.

## Seeds

* Carlos Moyá (champion)
* David Nalbandian (quarterfinals)
* Fernando González (second round)
* Gastón Gaudio (semifinals)
* Juan Ignacio Chela (quarterfinals)
* Gustavo Kuerten (semifinals)
* Nicolás Lapentti (second round)
* Guillermo Coria (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 | Final |
| 1 | Carlos Moyá | 7$^{10}$ | 6 | | | | | | |
| WC/6 | Gustavo Kuerten | 6$^8$ | 1 | | | | | | |
| WC/6 | Gustavo Kuerten | 6$^8$ | 1 | | 1 | Carlos Moyá | 6 | 4 | 6 |
| | | | | | 8 | Guillermo Coria | 3 | 6 | 4 |
| 4 | Gastón Gaudio | 3 | 6 | 3 | 8 | Guillermo Coria | 3 | 6 | 4 |
| 8 | Guillermo Coria | 6 | 1 | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | C Moyá | 6 | 6 | | | | | | | | | | | | | | |
| | D Ferrer | 3 | 3 | 1 | C Moyá | 6 | 6 | | | | | | | | | | |
| WC | E Massa | 6 | 6 | WC | E Massa | 2 | 2 | | | | | | | | | | |
| | A Martín | 4 | 4 | | | | | | 1 | C Moyá | 6$^4$ | 6 | 7 | | | | |
| | L Horna | 6 | 6 | | | | | | | L Horna | 7$^7$ | 3 | 5 | | | | |
| Q | É Prodon | 3 | 2 | | L Horna | 6 | 6 | | | | | | | | | | |
| Q | A Gaudenzi | 4 | 1 | 7 | N Lapentti | 3 | 4 | | | | | | | | | | |
| 7 | N Lapentti | 6 | 6 | | | | | | | | | | | 1 | C Moyá | 7$^{10}$ | 6 |
| 3 | F González | 7$^7$ | 6 | | | | | | | | | | | WC/6 | G Kuerten | 6$^8$ | 1 |
| | D Sánchez | 6$^4$ | 3 | 3 | F González | | | | | | | | | | | | |
| | F Mantilla | 6 | 6 | | F Mantilla | w/o | | | | | | | | | | | |
| | A Portas | 3 | 1 | | | | | | | F Mantilla | 2 | 7$^7$ | 1 | | | | |
| Q | G Etlis | 6$^3$ | 3 | | | | | | WC/6 | G Kuerten | 6 | 6$^4$ | 6 | | | | |
| | F Saretta | 7$^7$ | 6 | | F Saretta | 4 | 7$^7$ | 5 | | | | | | | | | |
| LL | I Miranda | 2 | 4 | WC/6 | G Kuerten | 6 | 6$^5$ | 7 | | | | | | | | | |
| WC/6 | G Kuerten | 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 | Semifinals |
| 5 | J I Chela | 2 | 6 | 6 | | | | | | | | | | | | | | | |
| Q | M Charpentier | 6 | 3 | 1 | 5 | J I Chela | 7 | 7 | | | | | | | | | | | |
| | A Calleri | 6 | 2 | 6 | | A Calleri | 5 | 5 | | | | | | | | | | | |
| | N Massú | 4 | 6 | 4 | | | | | | 5 | J I Chela | 3 | 4 | | | | | | |
| | A Montañés | 4 | 1 | | | | | | | 4 | G Gaudio | 6 | 6 | | | | | | |
| | F Meligeni | 6 | 6 | | | F Meligeni | 6$^4$ | 6 | 0 | | | | | | | | | | |
| WC | M Puerta | 4 | 2 | | 4 | G Gaudio | 7$^7$ | 4 | 6 | | | | | | | | | | |
| 4 | G Gaudio | 6 | 6 | | | | | | | | | | | | 4 | G Gaudio | 3 | 6 | 3 |
| 8 | G Coria | 6 | 3 | 6 | | | | | | | | | | | 8 | G Coria | 6 | 1 | 6 |
| | J Acasuso | 3 | 6 | 2 | 8 | G Coria | 6 | 2 | 6 | | | | | | | | | | |
| | M Zabaleta | 6 | 6 | | | M Zabaleta | 4 | 6 | 3 | | | | | | | | | | |
| | A Sávolt | 3 | 4 | | | | | | | 8 | G Coria | 3 | 6 | 7$^7$ | | | | | |
| | F Squillari | 2 | 6 | 6 | | | | | | 2 | D Nalbandian | 6 | 3 | 6$^5$ | | | | | |
| | A Sá | 6 | 3 | 2 | | F Squillari | 1 | 3 | | | | | | | | | | | |
| | F Vicente | 3 | 5 | | 2 | D Nalbandian | 6 | 6 | | | | | | | | | | | |
| 2 | D Nalbandian | 6 | 7 | | | | | | | | | | | | | | | | |