Boys' singles
2008 US Open
Champion	Grigor Dimitrov
Runner-up	Devin Britton
Score	6–4, 6–3

Ričardas Berankis was the defending champion but, no longer competing in junior tennis, did not defend his title.

Grigor Dimitrov won in the final 6–4, 6–3, against Devin Britton.

Seeds

Draw

Finals

	Quarterfinals							Semifinals							Final
	1	Yang Tsung-hua	6	65	6
	WC	Rhyne Williams	3	77	3
								1	Yang Tsung-hua	3	7	2
								3	Grigor Dimitrov	6	5	6
	3	Grigor Dimitrov	6	6
		Chase Buchanan	4	3
															3	Grigor Dimitrov	6	6
															Q	Devin Britton	4	3
		Filip Krajinović	78	77
	4	Henri Kontinen	66	65
									Filip Krajinović	6	4	2
								Q	Devin Britton	1	6	6
	11	Cedrik-Marcel Stebe	3	6	3
	Q	Devin Britton	6	3	6

Top half

Section 1

	First round							Second round							Third round							Quarterfinals
	1	Tsung-hua Yang	78	6
		Nikolaus Moser	66	4				1	T-h Yang	6	6
	WC	Raymond Sarmiento	63	63				Q	D Schultz	1	1
	Q	Dominik Schultz	77	77											1	T-h Yang	3	6	6
		Daniel Smethurst	1	7	7										15	P Siributwong	6	2	1
	WC	Evan King	6	5	5				D Smethurst	3	2
		Mirza Bašić	4	3				15	P Siributwong	6	6
	15	Peerakit Siributwong	6	6																		1	T-h Yang	6	65	6
	9	Ryan Harrison	6	6																		WC	R Williams	3	77	3
		Adrien Puget	3	2				9	R Harrison	6	3	6
	Q	Hiroyasu Ehara	6	7				Q	H Ehara	1	6	2
	LL	James Seal	2	5											9	R Harrison	77	5	3
	WC	Rhyne Williams	6	6											WC	R Williams	65	7	6
		Borut Puc	2	4				WC	R Williams	7	77
		Marin Draganja	2	4				5	C Ramírez	5	62
	5	César Ramírez	6	6

Section 2

	First round							Second round							Third round							Quarterfinals
	3	Grigor Dimitrov	6	6
	Q	Julien Obry	2	2				3	G Dimitrov	7	6
		Ty D Trombetta	6	6					T D Trombetta	5	1
		Juan-Carlos Spir	3	1											3	G Dimitrov	6	6
	Q	José Hernández	2	2											14	M Arévalo	3	4
		Matt Reid	6	6					M Reid	6	5	4
	LL	Richard Becker	4	4				14	M Arévalo	1	7	6
	14	Marcelo Arévalo	6	6																		3	G Dimitrov	6	6
	10	Juan Vazquez-Valenzuela	6	6																			C Buchanan	4	3
		Tennys Sandgren	4	2				10	J Vazquez-Valenzuela	1	0
		Mikhail Biryukov	4	2					C Buchanan	6	6
		Chase Buchanan	6	6												C Buchanan	6	79
		Alessandro Giannessi	6	65	77											D Cox	3	67
	Q	Harry Fowler	4	77	63				A Giannessi	0	1
		Daniel Cox	5	77	6				D Cox	6	6
	8	Henrique Cunha	7	61	4

Bottom half

Section 3

	First round							Second round							Third round							Quarterfinals
	6	Guillaume Rufin	6	6
		Blaz Rola	1	1				6	G Rufin	3	7	6
		Dane Propoggia	0	2					M Willis	6	5	4
		Marcus Willis	6	6											6	G Rufin	4	63
		Filip Krajinović	65	6	4											F Krajinović	6	77
		Jarmere Jenkins	77	4	0r				F Krajinović	77	6
	WC	Denis Kudla	2	7	3			12	Y Bhambri	65	4
	12	Yuki Bhambri	6	5	6																		F Krajinović	78	77
	LL	Alex Llompart	6	3	6																	4	H Kontinen	66	65
	WC	Christian Harrison	4	6	3			LL	A Llompart	7	6
	WC	Jordan Cox	6	79				WC	J Cox	5	2
	LL	Yannik Reuter	4	67											LL	A Llompart	3	1
		Dino Marcan	6	6											4	H Kontinen	6	6
		Karim-Mohamed Maamoun	2	2					D Marcan	3	77	3
	Q	Takanyi Garanganga	67	3				4	H Kontinen	6	65	6
	4	Henri Kontinen	79	6

Section 4

	First round							Second round							Third round							Quarterfinals
	7	José Pereira	2	3
		Guido Pella	6	6					G Pella	6	6
		Di Wun	6	6					D Wun	3	1
		Tristan-Samuel Weissborn	3	4												G Pella	0	7	1
	WC	Alexander Domijan	77	6											11	C-M Stebe	6	5	6
		Kittipong Wachiramanowong	63	4				WC	A Domijan	3	6	3
		Cheng-peng Hsieh	3	2				11	C-M Stebe	6	4	6
	11	Cedrik-Marcel Stebe	6	6																		11	C-M Stebe	3	6	3
	13	Bradley Klahn	6	6																		Q	D Britton	6	3	6
		Pablo Carreno-Busta	4	3				13	B Klahn	4	6	6
	WC	Robert Johannes Van Overbeek	2	5					C Rungkat	6	1	3
		Christopher Rungkat	6	7											13	B Klahn	4	3
		Giacomo Miccini	5	4											Q	D Britton	6	6
	Q	Matthew Kandath	7	6				Q	M Kandath	1	4
	Q	Devin Britton	3	6	6			Q	D Britton	6	6
	2	Bernard Tomic	6	3	2

External links

• Draw