Singles
2003 St. Petersburg Open
Final
Champion	Gustavo Kuerten
Runner-up	Sargis Sargsian
Score	6–4, 6–3
Events
Singles Doubles
← 2002 · St. Petersburg Open · 2004 →

Sébastien Grosjean was the defending champion but lost in the quarterfinals to Àlex Corretja.

Gustavo Kuerten won in the final 6–4, 6–3 against Sargis Sargsian.

	Semifinals							Final
	1	Rainer Schüttler	3	3
		Sargis Sargsian	6	6
									Sargis Sargsian	4	3
								3	Gustavo Kuerten	6	6
	3	Gustavo Kuerten	6	6
	WC	Àlex Corretja	4	3

	First round							Second round							Quarterfinals							Semifinals
	1	R Schüttler	77	6
	Q	J-R Lisnard	65	1				1	R Schüttler	6	6
	WC	V Davletshin	63	3					V Voltchkov	2	3
		V Voltchkov	77	6											1	R Schüttler	6	6
		N Kiefer	6	3	4										5	M Youzhny	3	3
		Y Kafelnikov	2	6	6				Y Kafelnikov	2	2
		A Pavel	77	61	1			5	M Youzhny	6	6
	5	M Youzhny	63	77	6																	1	R Schüttler	3	3
	4	M Mirnyi	4	61																			S Sargsian	6	6
	WC	I Andreev	6	77				WC	I Andreev	3	2
		S Sargsian	6	6					S Sargsian	6	6
		R Štěpánek	3	2												S Sargsian	6	6
		L Burgsmüller	2	78	6											L Burgsmüller	3	1
	Q	A Ram	6	66	1				L Burgsmüller	6	6
		F Vicente	62	6	6				F Vicente	4	4
	8	M Safin	77	4	3

	First round							Second round							Quarterfinals							Semifinals
	6	V Spadea	4	6	6
		N Davydenko	6	1	2			6	V Spadea	6	4	7
		D Ferrer	5	2					D Hrbatý	4	6	5
		D Hrbatý	7	6											6	V Spadea	4	64
		V Hănescu	7	7											3	G Kuerten	6	77
	Q	F Čermák	5	5					V Hănescu	61	61
		B Vahaly	65	4				3	G Kuerten	77	77
	3	G Kuerten	77	6																		3	G Kuerten	6	6
	7	G Gaudio	64	77	6																	WC	À Corretja	4	3
		A Martín	77	65	2			7	G Gaudio	3	1
	Q	J Vacek	4	1				WC	À Corretja	6	6
	WC	À Corretja	6	6											WC	À Corretja	4	6	77
		D Sánchez	2	3											2	S Grosjean	6	2	65
		A Dupuis	6	6					A Dupuis	2	2
		S Koubek	77	3	5			2	S Grosjean	6	6
	2	S Grosjean	64	6	7

• 2003 St. Petersburg Open Draw
• 2003 St. Petersburg Open Qualifying Draw