Singles
2003 Canada Masters and the Rogers AT&T Cup
2002 Champion	Guillermo Cañas
Champion	Andy Roddick
Runner-up	David Nalbandian
Final score	6–1, 6–3
Events
Singles men women Doubles men women
← 2002 · Canada Masters · 2004 → ← 2002 · Rogers AT&T Cup · 2004 →

The 2003 Canada Masters singles was the men's singles event of the one hundred and fourteenth edition of the Canada Masters; a WTA Tier I tournament and the most prestigious men's tennis tournament held in Canada. Guillermo Cañas was the defending champion but did not compete that year. Andy Roddick won in the final 6–1, 6–3 against David Nalbandian.

Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.

Draw

Key

Finals

	Semifinals							Final
	8	Rainer Schüttler	6	2	2
		David Nalbandian	3	6	6
									David Nalbandian	1	3
								6	Andy Roddick	6	6
	3	Roger Federer	4	6	63
	6	Andy Roddick	6	3	77

Top half

Section 1

	First round							Second round							Third round							Quarterfinals
	1	A Agassi	6	6
	WC	F Niemeyer	4	2				1	A Agassi	77	6
		N Davydenko	77	4	6				N Davydenko	63	2
	WC	F Dancevic	63	6	3										1	A Agassi	6	6
		F Santoro	6	3	4											S Larose	4	2
		J Acasuso	2	6	6				J Acasuso	65	6	5
	WC	S Larose	7	77				WC	S Larose	77	1	7
	13	G Kuerten	5	62																		1	A Agassi	6	2	3
	10	J Novák	7	3	6																	8	R Schüttler	2	6	6
		M An?i?	5	6	3			10	J Novák	77	6
		R ?t?pánek	63	4					J Blake	65	3
		J Blake	77	6											10	J Novák	5	0
		Y Kafelnikov	1	6	6										8	R Schüttler	7	6
	Q	G Carraz	6	2	4				Y Kafelnikov	1	4
		M Youzhny	2	4				8	R Schüttler	6	6
	8	R Schüttler	6	6

Section 2

	First round							Second round							Third round							Quarterfinals
	4	C Moyá	64	6	3
		A Clément	77	4	6				A Clément	0	77	5
		V Spadea	6	6					V Spadea	6	65	7
		R Sluiter	3	4												V Spadea	4	2
		J Nieminen	65	65												D Nalbandian	6	6
		D Nalbandian	77	77					D Nalbandian	6	6
		T Henman	6						T Henman	4	4
	14	F González	2	r																			D Nalbandian	6	6
	12	S Schalken	1	1																			F López	4	4
		M Zabaleta	6	6					M Zabaleta	1	1
	Q	K Beck	66	77	6			Q	K Beck	6	6
	Q	M Llodra	78	63	1										Q	K Beck	4	63
		P-H Mathieu	77	6												F López	6	77
	Q	S Draper	65	4					P-H Mathieu	4	6	5
		F López	6						F López	6	3	7
	7	G Coria	3	r

Bottom half

Section 3

	First round							Second round							Third round							Quarterfinals
	5	L Hewitt	6	6
	Q	B Bryan	2	2				5	L Hewitt	5	77	5
	LL	N Massú	4	64					M Mirnyi	7	64	7
		M Mirnyi	6	77												M Mirnyi	6	6
	WC	D Nestor	3	6	6										11	P Srichaphan	3	2
		R Ginepri	6	3	4			WC	D Nestor	5	4
		A Martín	0	65				11	P Srichaphan	7	6
	11	P Srichaphan	6	77																			M Mirnyi	2	63
	16	T Robredo	6	77																		3	R Federer	6	77
		H-T Lee	4	60				16	T Robredo	6	6
		W Ferreira	4	1r				Q	W Black	0	2
	Q	W Black	6	2											16	T Robredo	4	3
		N Lapentti	5	3											3	R Federer	6	6
		G Rusedski	7	6					G Rusedski	4	3
		G Gaudio	4	6	5			3	R Federer	6	6
	3	R Federer	6	3	7

Section 4

	First round							Second round							Third round							Quarterfinals
	6	A Roddick	3	6	6
		X Malisse	6	0	2			6	A Roddick	78	6
		A Calleri	7	4	3				J I Chela	66	2
		J I Chela	5	6	6										6	A Roddick	6	6
	Q	R Delgado	77	77											9	S Grosjean	3	3
		I Ljubi?i?	60	63				Q	R Delgado	3	2
		F Vicente	3	3				9	S Grosjean	6	6
	9	S Grosjean	6	6																		6	A Roddick	77	6
	15	M Verkerk	6	4	7																		K Ku?era	65	3
		S Sargsian	2	6	5			15	M Verkerk	68	63
		K Ku?era	77	77					K Ku?era	710	77
		J-M Gambill	63	63												K Ku?era	6	7
		Y El Aynaoui	6	68	6										2	J C Ferrero	3	5
		M Fish	3	710	3				Y El Aynaoui	3	4
	Q	C Saulnier	4	4				2	J C Ferrero	6	6
	2	J C Ferrero	6	6

External links

• 2003 Canada Masters Draw