Singles
2003 St. Petersburg Open
Champion	Gustavo Kuerten
Runner-up	Sargis Sargsian
Score	6–4, 6–3

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.

Seeds

Draw

Finals

	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

Top half

	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

Bottom half

	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

References

• 2003 St. Petersburg Open Draw