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.

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.

	Final
	1	Kim Clijsters	6	6
		Mary Pierce	2	1

	First round							Second round							Quarterfinals							Semifinals
								1	K Clijsters	6	6
		E Daniilidou	4	6	2				M Sánchez Lorenzo	1	0
		M Sánchez Lorenzo	6	4	6										1	K Clijsters	3	7	6
		T Pisnik	6	6											7	S Farina Elia	6	5	4
		D Chládková	2	1					T Pisnik	0	4
	WC	A Stevenson	77	5	2			7	S Farina Elia	6	6
	7	S Farina Elia	65	7	6																	1	K Clijsters	6	6
																						Q	D Safina	1	1
								3	P Schnyder	6	2	1
	Q	J Janković	4	0	r			Q	D Safina	4	6	6
	Q	D Safina	6	2											Q	D Safina	6	4	6
		M Vento-Kabchi	2	3											5	F Schiavone	2	6	4
	Q	K Šprem	6	6				Q	K Šprem	64	3
		É Loit	2	6	3			5	F Schiavone	77	6
	5	F Schiavone	6	4	6

	First round							Second round							Quarterfinals							Semifinals
	8	M Serna	6	1	6
		P Mandula	3	6	2			8	M Serna	2	4
		M Pierce	7	6					M Pierce	6	6
	LL	A Parra	5	2												M Pierce	6	6
		E Bovina	4	6	6											E Bovina	3	4
	Q	A Medina Garrigues	6	2	4				E Bovina	4	77	6
								4	J Dokić	6	65	0
																							M Pierce	6	6
	6	A Smashnova-Pistolesi	6	5	1/r																	WC	T Golovin	4	0
	WC	T Golovin	1	7	3			WC	T Golovin	w/o
		S Testud	3	r					D Hantuchová
		D Hantuchová	5												WC	T Golovin	6	6
	WC	S Cohen-Aloro	4	6	7										2	E Dementieva	4	4
	LL	C Schaul	6	3	5			WC	S Cohen-Aloro	5	6	4
								2	E Dementieva	7	1	6

• 2004 Open Gaz de France Draw