# 2003 Open Gaz de France – Singles

Venus Williams was the defending champion but did not compete that year.
Serena Williams won in the final 6–3, 6–2 against Amélie Mauresmo.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. The top four seeds received a bye to the second round.
* Serena Williams (champion)
* Daniela Hantuchová (quarterfinals)
* Amélie Mauresmo (final)
* Jelena Dokić (quarterfinals)
* Patty Schnyder (first round)
* Silvia Farina Elia (first round)
* Anna Pistolesi (first round)
* Eleni Daniilidou (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

### Final

| Final | Final | Final | Final | Final |
| 1 | Serena Williams | 6 | 6 | |
| 3 | Amélie Mauresmo | 3 | 2 | |

### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | S Williams | 6 | 6 | | | | | | | | |
| | M Casanova | 4 | 7 | 6 | | M Casanova | 0 | 4 | | | | | | | | |
| | B Schett | 6 | 5 | 3 | | | | | 1 | S Williams | 6 | 6 | | | | |
| | J Husárová | 1 | 6 | 6 | | | | | | J Husárová | 3 | 3 | | | | |
| Q | G Arn | 6 | 2 | 0 | | J Husárová | 6 | 6 | | | | | | | | |
| | T Pisnik | 6 | 6 | | | T Pisnik | 4 | 3 | | | | | | | | |
| 5 | P Schnyder | 3 | 3 | | | | | | | | | | 1 | S Williams | 6 | 6 |
| | | | | | | | | | | | | | 8 | E Daniilidou | 2 | 0 |
| | | | | | 4 | J Dokić | 6 | 6 | | | | | | | | |
| Q | V Razzano | 3 | 2 | | | É Loit | 3 | 4 | | | | | | | | |
| | É Loit | 6 | 6 | | | | | | 4 | J Dokić | 1 | 3 | | | | |
| Q | S Foretz | 6 | 5 | 7 | | | | | 8 | E Daniilidou | 6 | 6 | | | | |
| | N Pratt | 2 | 7 | 5 | Q | S Foretz | 0 | 4 | | | | | | | | |
| | A Stevenson | 3 | 5 | | 8 | E Daniilidou | 6 | 6 | | | | | | | | |
| 8 | E Daniilidou | 6 | 7 | | | | | | | | | | | | | |

### Section 2

| 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 |
| 7 | A Pistolesi | 3 | 2 | | | | | | | | | | | | | | |
| WC | S Cohen-Aloro | 6 | 6 | | WC | S Cohen-Aloro | 6$^3$ | 7$^7$ | 3 | | | | | | | | |
| | D Bedáňová | 3 | 6$^5$ | | | M Serna | 7$^7$ | 6$^2$ | 6 | | | | | | | | |
| | M Serna | 6 | 7$^7$ | | | | | | | | M Serna | 6$^4$ | 4 | | | | |
| | A Sugiyama | 6 | 6 | | | | | | | 3 | A Mauresmo | 7$^7$ | 6 | | | | |
| | N Dechy | 2 | 4 | | | A Sugiyama | 5 | 2 | | | | | | | | | |
| | | | | | 3 | A Mauresmo | 7 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | 3 | A Mauresmo | 6 | 6 |
| 6 | S Farina Elia | 3 | 6 | 5 | | | | | | | | | | | E Dementieva | 0 | 0 |
| | R Grande | 6 | 1 | 7 | | R Grande | 3 | 6 | 3 | | | | | | | | |
| Q | D Chládková | 4 | 3 | | | E Dementieva | 6 | 4 | 6 | | | | | | | | |
| | E Dementieva | 6 | 6 | | | | | | | | E Dementieva | 7 | 6 | | | | |
| WC | M Bartoli | 3 | 4 | | | | | | | 2 | D Hantuchová | 5 | 3 | | | | |
| | M Matevžič | 6 | 6 | | | M Matevžič | 3 | 3 | | | | | | | | | |
| | | | | | 2 | D Hantuchová | 6 | 6 | | | | | | | | | |