# 2003 Abierto Mexicano Telefonica Movistar – Women's singles

Katarina Srebotnik was the defending champion, but lost in second round to Petra Mandula.
Amanda Coetzer won the title by defeating Mariana Díaz Oliva 7–5, 6–3 in the final. It was the 9th and last title for Coetzer in her career.

## Seeds

The first two seeds received a bye into the second round.
* Elena Dementieva (second round)
* Amanda Coetzer (champion)
* Paola Suárez (first round, retired due to a back injury)
* Katarina Srebotnik (second round)
* Magüi Serna (first round)
* Tina Pisnik (first round)
* Émilie Loit (semifinals)
* Emmanuelle Gagliardi (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 | Semifinals | Final | Final | Final | Final |
| | Shinobu Asagoe | 1 | 7$^7$ | 1 | | | | |
| | Mariana Díaz Oliva | 6 | 6$^5$ | 6 | | | | |
| | Mariana Díaz Oliva | 6 | 6$^5$ | 6 | | Mariana Díaz Oliva | 5 | 3 |
| | | | | | 2 | Amanda Coetzer | 7 | 6 |
| 7 | Émilie Loit | 3 | 4 | | 2 | Amanda Coetzer | 7 | 6 |
| 2 | Amanda Coetzer | 6 | 6 | | | | | |

### 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 | E Dementieva | 7 | 3 | 3 | | | | | | | | | |
| | S Asagoe | 6$^4$ | 6 | 7$^7$ | | S Asagoe | 5 | 6 | 6 | | | | | | | | | |
| | A Serra Zanetti | 7$^7$ | 2 | 6$^1$ | | | | | | | S Asagoe | 6 | 5 | 7 | | | | |
| | C Torrens Valero | 7$^7$ | 4 | 6 | | | | | | | C Torrens Valero | 4 | 7 | 5 | | | | |
| | R de los Ríos | 6$^3$ | 6 | 2 | | C Torrens Valero | 7$^8$ | 7$^{10}$ | | | | | | | | | | |
| WC | ME Salerni | 7 | 1 | 4 | 8 | E Gagliardi | 6$^6$ | 6$^8$ | | | | | | | | | | |
| 8 | E Gagliardi | 5 | 6 | 6 | | | | | | | | | | | S Asagoe | 1 | 7$^7$ | 1 |
| 3 | P Suárez | 2$^r$ | | | | | | | | | | | | | M Díaz Oliva | 6 | 6$^5$ | 6 |
| | M Díaz Oliva | 5 | | | | M Díaz Oliva | 6 | 6 | | | | | | | | | | |
| | M Müller | 1 | 6 | 6 | | M Müller | 1 | 2 | | | | | | | | | | |
| | Å Svensson | 6 | 2 | 4 | | | | | | | M Díaz Oliva | 6 | 4 | 7$^7$ | | | | |
| PR | A Medina Garrigues | 6 | 6 | | | | | | | Q | A Vašková | 3 | 6 | 6$^5$ | | | | |
| | A Roesch | 4 | 1 | | PR | A Medina Garrigues | 5 | 6$^6$ | | | | | | | | | | |
| Q | A Vašková | 6 | 6 | | Q | A Vašková | 7 | 7$^8$ | | | | | | | | | | |
| 5 | M Serna | 3 | 2 | | | | | | | | | | | | | | | |

### 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 | É Loit | 6 | 6 | | | | | | | | | | | | | | | |
| PR | J Kruger | 3 | 0 | | 7 | É Loit | 4 | 6 | 6 | | | | | | | | | |
| Q | M Sequera | 1 | 2 | | | M Marrero | 6 | 3 | 3 | | | | | | | | | |
| | M Marrero | 6 | 6 | | | | | | | 7 | É Loit | 3 | 6 | 6 | | | | |
| Q | I Abramović | 3 | 6$^2$ | | | | | | | | P Mandula | 6 | 2 | 1 | | | | |
| | P Mandula | 6 | 7$^7$ | | | P Mandula | 6 | 6 | | | | | | | | | | |
| | F Zuluaga | 4 | 6$^4$ | | 4 | K Srebotnik | 4 | 2 | | | | | | | | | | |
| 4 | K Srebotnik | 6 | 7$^7$ | | | | | | | | | | | | 7 | É Loit | 3 | 4 |
| 6 | T Pisnik | 6 | 4 | 3 | | | | | | | | | | | 2 | A Coetzer | 6 | 6 |
| | P Wartusch | 3 | 6 | 6 | | P Wartusch | 4 | 6 | 4 | | | | | | | | | |
| Q | P García | 3 | 2 | | | F Pennetta | 6 | 2 | 6 | | | | | | | | | |
| | F Pennetta | 6 | 6 | | | | | | | | F Pennetta | 6 | 2 | 3 | | | | |
| | K Koukalová | 6 | 6 | | | | | | | 2 | A Coetzer | 4 | 6 | 6 | | | | |
| WC | M Torres Sandoval | 0 | 2 | | | K Koukalová | 4 | 6 | 5 | | | | | | | | | |
| | | | | | 2 | A Coetzer | 6 | 3 | 7 | | | | | | | | | |