Singles
2005 St. Petersburg Open
Final
Champion	Thomas Johansson
Runner-up	Nicolas Kiefer
Score	6–4, 6–2
Events
Singles Doubles
← 2004 · St. Petersburg Open · 2006 →

Mikhail Youzhny was the defending champion, but lost in the quarterfinals this year.

Thomas Johansson won the title, beating Nicolas Kiefer 6–4, 6–2 in the final.

	Semifinals							Final
	5	Nicolas Kiefer	6	6
		Robin Vik	3	4
								5	Nicolas Kiefer	4	2
								2	Thomas Johansson	6	6
	8	Fernando Verdasco	3	6	3
	2	Thomas Johansson	6	3	6

	First round							Second round							Quarterfinals							Semifinals
	1	N Davydenko	6	6
		L Dlouhý	2	1				1	N Davydenko	6	6
		P Goldstein	78	2	6				P Goldstein	3	4
		L Burgsmüller	66	6	3										1	N Davydenko	1	1
	WC	V Davletshin	3	4											5	N Kiefer	6	6
		J Melzer	6	6					J Melzer	6	3	5
		G García-López	3	6	4			5	N Kiefer	3	6	7
	5	N Kiefer	6	3	6																	5	N Kiefer	6	6
	4	M Youzhny	6	4																			R Vik	3	4
		K Beck	3	1r				4	M Youzhny	6	6
	WC	I Kunitsyn	3	2					C Saulnier	1	1
		C Saulnier	6	6											4	M Youzhny	6	4	2
		F Serra	62	6	6											R Vik	1	6	6
	Q	J Björkman	77	3	4				F Serra	63	6	3
		R Vik	6	6					R Vik	77	2	6
	6	J Nieminen	4	4

	First round							Second round							Quarterfinals							Semifinals
	8	F Verdasco	77	4	6
	WC	M Philippoussis	64	6	2			8	F Verdasco	7	6
	Q	T Gabashvili	3	3					J Mónaco	5	3
		J Mónaco	6	6											8	F Verdasco	6	6
		A Popp	3	6	4											K Carlsen	4	2
	Q	S Stakhovsky	6	4	6			Q	S Stakhovsky	77	62	66
		K Carlsen	64	77	6				K Carlsen	65	77	78
	3	M Mirnyi	77	65	4																	8	F Verdasco	3	6	3
	7	G Rusedski	6	6																		2	T Johansson	6	3	6
		D Tursunov	4	4				7	G Rusedski	4	6	6
		I Minář	1	6	5				K Kim	6	3	4
		K Kim	6	4	7										7	G Rusedski	2	66
	Q	J Vaněk	3	65											2	T Johansson	6	78
		A Pavel	6	77					A Pavel	2	2
		P Kohlschreiber	3	4				2	T Johansson	6	6
	2	T Johansson	6	6

• Main Draw
• Qualifying Draw