Serena Williams was the defending champion but did not compete that year.
Kim Clijsters won in the final 6–2, 6–1 against Mary Pierce.
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.
Kim Clijsters (champion) Elena Dementieva (quarterfinals) Patty Schnyder (second round) Jelena Dokić (second round) Francesca Schiavone (quarterfinals) Anna Smashnova-Pistolesi (first round) Silvia Farina Elia (quarterfinals) Magüi Serna (second round)
Draw
Final
Section 1
Section 2
External links 2004 Open Gaz de France Draw