Girls' singles
2003 US Open
Final
Champion	Kirsten Flipkens
Runner-up	Michaëlla Krajicek
Score	6–3, 7–5
Events
Singles men women boys girls Doubles men women mixed boys girls WC Singles men women quad WC Doubles men women quad Legends men women mixed
← 2002 · US Open · 2004 →

Maria Kirilenko was the defending champion, but did not compete in the juniors that year.

Kirsten Flipkens won the tournament, defeating Michaëlla Krajicek in the final, 6–3, 7–5.

	Quarterfinals							Semifinals							Final
	15	Kateryna Bondarenko	6	63	77
	12	Ryōko Fuda	4	77	64
								15	Kateryna Bondarenko	1	6	2
								4	Kirsten Flipkens	6	4	6
	4	Kirsten Flipkens	6	4	6
		Olga Govortsova	1	6	3
															4	Kirsten Flipkens	6	7
															2	Michaëlla Krajicek	3	5
		Ana Ivanovic	2	4
	Q	Cory Ann Avants	6	6
								Q	Cory Ann Avants	2	2
								2	Michaëlla Krajicek	6	6
	5	Tatiana Golovin	1	4
	2	Michaëlla Krajicek	6	6

	First round							Second round							Third round							Quarterfinals
	1	Bethanie Mattek	6	6
	Q	Tara Iyer	0	4				1	B Mattek	6	5	6
		Haidy El Tabakh	3	64				Q	L Burdette	3	7	2
	Q	Lindsay Burdette	6	77											1	B Mattek	0	6	4
		Katarina Zoricic	?	6											15	K Bondarenko	6	4	6
	Q	Neha Uberoi	?	4					K Zoricic	4	4
		Alla Kudryavtseva	77	3	2			15	K Bondarenko	6	6
	15	Kateryna Bondarenko	63	6	6																	15	K Bondarenko	6	63	77
	12	Ryōko Fuda	4	6	6																	12	R Fuda	4	77	64
	WC	Alexa Glatch	6	2	3			12	R Fuda	6	6
	WC	Mary Gambale	5	6	6			WC	M Gambale	3	3
	WC	Jessica Kirkland	7	0	4										12	R Fuda	6	6
		Lucie Šafářová	7	7											7	M Domachowska	4	4
		Michelle Mitchell	5	5					L Šafářová	3	5
	Q	Jessi Robinson	5	0				7	M Domachowska	6	7
	7	Marta Domachowska	7	6

	First round							Second round							Third round							Quarterfinals
	4	Kirsten Flipkens	6	6
		Julia Cohen	3	1				4	K Flipkens	6	6
	WC	Audra Cohen	1	65				WC	V King	1	1
	WC	Vania King	6	77											4	K Flipkens	6	6
		Sanja Ančić	3	6	6											S Ančić	0	2
	WC	Alexandra Mueller	6	4	4				S Ančić	6	3	6
		Megan Moulton-Levy	2	4				13	B Ko	4	6	2
	13	Beier Ko	6	6																		4	K Flipkens	6	4	6
	9	Vojislava Lukić	2	2																			O Govortsova	1	6	3
		Jamea Jackson	6	6					J Jackson	4	6	2
		Sanaa Bhambri	2	0r					O Govortsova	6	4	6
		Olga Govortsova	6	3												O Govortsova	6	6
	WC	Theresa Logar	6	6												S-N Sun	2	2
		Mădălina Gojnea	3	1				WC	T Logar	1	62
		Sun Sheng-Nan	7	6					S-N Sun	6	77
	6	Kateřina Böhmová	5	3

	First round							Second round							Third round							Quarterfinals
	8	Allison Baker	6	6
		Mari Andersson	1	1				8	A Baker	6	3	5
		Timea Bacsinszky	6	1	2				A Ivanovic	2	6	7
		Ana Ivanovic	3	6	6											A Ivanovic	6	6
	Q	Jennifer-Lee Heinser	0	64											11	A Hlaváčková	4	0
		Ágnes Szávay	6	77					Á Szávay	2	2
		Eden Marama	3	3				11	A Hlaváčková	6	6
	11	Andrea Hlaváčková	6	6																			A Ivanovic	2	4
	16	Anna Chakvetadze	6	6																		Q	CA Avants	6	6
		Sessil Karatantcheva	0	1				16	A Chakvetadze	66	2
		Megan Falcon	4	4					S Pe'er	78	6
		Shahar Pe'er	6	6												S Pe'er	2	3
		Aleksandra Wozniak	6	62	2										Q	CA Avants	6	6
		Peng Shuai	4	77	6				S Peng	6	5	66
	Q	Cory Ann Avants	66	6	6			Q	CA Avants	2	7	78
	3	Jarmila Gajdosova	78	4	3

	First round							Second round							Third round							Quarterfinals
	5	Tatiana Golovin	77	6
	Q	Olga Puchkova	64	3				5	T Golovin	6	6
		Ágnes Szatmári	3	2					I Ichim	3	1
		Iris Ichim	6	6											5	T Golovin	6	6
		Lara Giltinan	3	2											10	E Laine	2	2
		Sania Mirza	6	6					S Mirza	2	4
	Q	Ellah Nze	2	0				10	E Laine	6	6
	10	Emma Laine	6	6																		5	T Golovin	1	4
	14	Nadja Pavic	6	6																		2	M Krajicek	6	6
		Yung-Jan Chan	0	3				14	N Pavic	2	2
		Rui Du	2	4					N Vaidišová	6	6
		Nicole Vaidišová	6	6												N Vaidišová	2	3
		Olena Tsutskova	6	1	6										2	M Krajicek	6	6
	WC	Elizabeth Kobak	2	6	3				O Tsutskova	4	1
		Krystina Marcio	2	1				2	M Krajicek	6	6
	2	Michaëlla Krajicek	6	6

• Draw