Boys' singles
2003 Wimbledon Championships
Final
Champion	Florin Mergea
Runner-up	Chris Guccione
Score	6–2, 7–6(7–3)
Details
Draw	64 (8 Q / 7 WC )
Seeds	16
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 seniors
← 2002 · Wimbledon Championships · 2004 →

Todd Reid was the defending champion, but did not complete in the Juniors this year.

Florin Mergea defeated Chris Guccione in the final, 6–2, 7–6^(7–3) to win the boys' singles tennis title at the 2003 Wimbledon Championships.^[1]

Click on the seed number of a player to go to their draw section.

	Quarterfinals							Semifinals							Final
	1	Tomáš Berdych	65	65
	6	Florin Mergea	77	77
								6	Florin Mergea	6	65	6
								7	Jo-Wilfried Tsonga	4	77	4
		Luis-Manuel Flores	2	4
	7	Jo-Wilfried Tsonga	6	6
															6	Florin Mergea	6	77
																Chris Guccione	2	63
		Horia Tecău	6	64	6
		Brendan Evans	4	77	1
									Horia Tecău	3	4
									Chris Guccione	6	6
	8	Chris Guccione	77	7
	2	Brian Baker	63	5

	First round							Second round							Third round							Quarterfinals
	1	Tomáš Berdych	7	6
		Andreas Weber	5	4				1	T Berdych	6	6
		Adam Feeney	6	7					A Feeney	4	1
		Josselin Ouanna	3	5											1	T Berdych	6	6
		Jaime Cuellar	65	5												J Goodall	2	3
		Josh Goodall	77	7					J Goodall	6	77
	Q	Alex Kuznetsov	77	62	4			14	H-j Suk	1	65
	14	Suk Hyun-joon	65	77	6																	1	T Berdych	65	65
	11	Bruno Rosa	6	7																		6	F Mergea	77	77
		Scott Oudsema	4	5				11	B Rosa	6	6
		José Luis Muguruza	2	2				WC	M Kasiri	3	2
	WC	Miles Kasiri	6	6											11	B Rosa	2	3
		Juan-Pablo Amado	4	6	6										6	F Mergea	6	6
		Romano Tatuhey	6	3	3				J-P Amado	2	65
	Q	Daniel Müller	63	1				6	F Mergea	6	77
	6	Florin Mergea	77	6

	First round							Second round							Third round							Quarterfinals
	3	Dudi Sela	6	3	6
		Karan Rastogi	2	6	3			3	D Sela	4	4
		Rok Jarc	5	4					M Zverev	6	6
		Mischa Zverev	7	6												M Zverev	68	6	3
		Lado Chikhladze	3	6	5											L-M Flores	710	3	6
		Luis-Manuel Flores	6	3	7				L-M Flores	6	6
	WC	Adam Fass	2	2				16	D Brewer	2	4
	16	David Brewer	6	6																			L-M Flores	2	4
	12	Chris Kwon	4	6	6																	7	J-W Tsonga	6	6
		Jarrett Chirico	6	3	4			12	C Kwon	6	6
	Q	Konstantin Kravchuk	77	6				Q	K Kravchuk	3	3
		Adrian Ungur	61	1											12	C Kwon	1	65
	WC	Guy Thomas	3	6											7	J-W Tsonga	6	77
		Haythem Abid	6	7					H Abid	2	4
	WC	Tom Burn	65	5				7	J-W Tsonga	6	6
	7	Jo-Wilfried Tsonga	77	7

	First round							Second round							Third round							Quarterfinals
	5	György Balázs	4	2
		Horia Tecău	6	6					H Tecău	6	7
		Devin Mullings	77	5	6				D Mullings	3	5
		Somdev Devvarman	63	7	1											H Tecău	6	6
	Q	Robert Smeets	6	6											Q	R Smeets	4	4
		Phillip Simmonds	4	3				Q	R Smeets	6	6
	Q	Peter Steinberger	6	6				Q	P Steinberger	3	0
	10	Andy Murray	4	4																			H Tecău	6	64	6
	15	Frederico Gil	4	77	6																		B Evans	4	77	1
	Q	Ross Hutchins	6	65	4			15	F Gil	6	77
	Q	Mat Lowe	6	62	6				M Lowe	2	64
		Tomislav Hadžić	4	77	3										15	F Gil	1	2
		Brendan Evans	6	77												B Evans	6	6
	WC	Richard Irwin	1	63					B Evans	79	6
		Kim Sun-yong	3	4				4	M Montcourt	67	4
	4	Mathieu Montcourt	6	6

	First round							Second round							Third round							Quarterfinals
	8	Chris Guccione	6	6
		Rafael Arévalo	3	4				8	C Guccione	6	6
		Pablo Figueroa	6	6					P Figueroa	3	2
	WC	Matthew Brown	3	2											8	C Guccione	6	6
		Robert Cameron	1	0												S Rieschick	3	4
		Sebastian Rieschick	6	6					S Rieschick	7	3	10
		Gaël Monfils	2	6	6				G Monfils	5	6	8
	9	Daniel Gimeno Traver	6	3	2																	8	C Guccione	77	7
	13	Leonardo Kirche	61	3																		2	B Baker	63	5
		Jamie Baker	77	6					J Baker	3	2
	Q	Denis Zivkovic	77	4	5				J Huta Galung	6	6
		Jesse Huta Galung	65	6	7											J Huta Galung	2	2
		Fabio Fognini	5	6	1										2	B Baker	6	6
	WC	Fritz Wolmarans	7	4	6				F Wolmarans	5	6	3
		Sergiy Stakhovsky	6	4	2			2	B Baker	7	4	6
	2	Brian Baker	2	6	6

• Source for the draw at Wimbledon.com
• "The Junior Championships, Wimbledon 2003". International Tennis Federation. Retrieved 27 May 2018.^{[permanent dead link]}