# 2003 Abierto Mexicano Telefonica Movistar – Men's singles

Carlos Moyá was the defending champion but lost in the quarterfinals to Félix Mantilla.
Agustín Calleri won in the final 7–5, 3–6, 6–3 against Mariano Zabaleta.

## Seeds

* Carlos Moyá (quarterfinals)
* David Nalbandian (second round)
* Gastón Gaudio (second round)
* Fernando González (quarterfinals)
* Juan Ignacio Chela (first round)
* Gustavo Kuerten (semifinals)
* Marcelo Ríos (quarterfinals)
* Nicolás Lapentti (first 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 | Semifinals | Final | Final | Final | Final |
| | Felix Mantilla | 2 | 2 | | | | | |
| | Agustín Calleri | 6 | 6 | | | | | |
| | Agustín Calleri | 6 | 6 | | Agustín Calleri | 7 | 3 | 6 |
| | | | | | Mariano Zabaleta | 5 | 6 | 3 |
| WC/6 | Gustavo Kuerten | 6$^4$ | 7$^7$ | 5 | Mariano Zabaleta | 5 | 6 | 3 |
| | Mariano Zabaleta | 7$^7$ | 6$^3$ | 7 | | | | |

### 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 | Semifinals | Semifinals | Semifinals |
| 1 | C Moyá | 6 | 6 | | | | | | | | | | | | | |
| | F Saretta | 0 | 2 | | 1 | C Moyá | 4 | 6 | 6 | | | | | | | |
| LL | R Mello | 6 | 4 | 6 | LL | R Mello | 6 | 3 | 2 | | | | | | | |
| WC | F Clavet | 4 | 6 | 1 | | | | | | 1 | C Moyá | 4 | 6$^4$ | | | |
| | A Martín | 2 | 1 | | | | | | | | F Mantilla | 6 | 7$^7$ | | | |
| | F Vicente | 6 | 6 | | | F Vicente | 3 | 4 | | | | | | | | |
| | F Mantilla | 7$^7$ | 7$^7$ | | | F Mantilla | 6 | 6 | | | | | | | | |
| 5 | J I Chela | 6$^4$ | 6$^1$ | | | | | | | | | | | F Mantilla | 2 | 2 |
| 3 | G Gaudio | 1 | 6 | 6 | | | | | | | | | | A Calleri | 6 | 6 |
| | D Sánchez | 6 | 4 | 4 | 3 | G Gaudio | 6$^5$ | 6$^5$ | | | | | | | | |
| | A Calleri | 6 | 6 | | | A Calleri | 7$^7$ | 7$^7$ | | | | | | | | |
| WC | M Gallardo-Valles | 1 | 3 | | | | | | | | A Calleri | 6 | 7 | | | |
| | F Meligeni | 1 | 4 | | | | | | | 7 | M Ríos | 3 | 5 | | | |
| LL | J A Marín | 6 | 6 | | LL | J A Marín | 3 | 1 | | | | | | | | |
| | F Squillari | 6 | 0 | 4 | 7 | M Ríos | 6 | 6 | | | | | | | | |
| 7 | M Ríos | 2 | 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| WC/6 | G Kuerten | 6$^2$ | 7$^{12}$ | 6 | | | | | | | | | | | | | | |
| Q | N Coutelot | 7$^7$ | 6$^{10}$ | 2 | WC/6 | G Kuerten | 5 | 6 | 6 | | | | | | | | | |
| | D Ferrer | 6 | 6 | | | D Ferrer | 7 | 1 | 2 | | | | | | | | | |
| | A Portas | 1 | 4 | | | | | | | WC/6 | G Kuerten | 6 | 0 | | | | | |
| | A Montañés | 3 | 0 | | | | | | | 4 | F González | 4 | 0$^r$ | | | | | |
| | S Sargsian | 6 | 6 | | | S Sargsian | 3 | 6 | 6$^5$ | | | | | | | | | |
| Q | R R Hidalgo | 1 | 6 | 6$^6$ | 4 | F González | 6 | 4 | 7$^7$ | | | | | | | | | |
| 4 | F González | 6 | 3 | 7$^8$ | | | | | | | | | | WC/6 | G Kuerten | 6$^4$ | 7$^7$ | 5 |
| 8 | N Lapentti | 2 | 1 | | | | | | | | | | | | M Zabaleta | 7$^7$ | 6$^3$ | 7 |
| | L Horna | 6 | 6 | | | L Horna | 6 | 3 | 2 | | | | | | | | | |
| | A Sá | 5 | 6 | 6$^1$ | Q | I Miranda | 2 | 6 | 6 | | | | | | | | | |
| Q | I Miranda | 7 | 4 | 7$^7$ | | | | | | Q | I Miranda | 5 | 3 | | | | | |
| Q | F Volandri | 1 | 2 | | | | | | | | M Zabaleta | 7 | 6 | | | | | |
| | M Zabaleta | 6 | 6 | | | M Zabaleta | 6$^5$ | 6 | 6 | | | | | | | | | |
| | N Massú | 6 | 1 | 4 | 2 | D Nalbandian | 7$^7$ | 0 | 0 | | | | | | | | | |
| 2 | D Nalbandian | 2 | 6 | 6 | | | | | | | | | | | | | | |