Doubles
2021 Saint Petersburg Challenger II
Final
Champions	Jesper de Jong Sem Verbeek
Runners-up	Konstantin Kravchuk Denis Yevseyev
Score	6–1, 3–6, [10–5]
Events
Singles Doubles
← 2021 · Saint Petersburg Challenger · 2022 →

Christopher Eubanks and Roberto Quiroz were the defending champions but chose not to defend their title.^[1]

Jesper de Jong and Sem Verbeek won the title after defeating Konstantin Kravchuk and Denis Yevseyev 6–1, 3–6, [10–5] in the final.

	First round							Quarterfinals							Semifinals							Final
	1	T Gabashvili A Nedovyesov	1	6	[4]
	Alt	I Sijsling G Smits	6	3	[10]			Alt	I Sijsling G Smits	2	4
		M Bašić H Bourchier	1	1					K Kravchuk D Yevseyev	6	6
		K Kravchuk D Yevseyev	6	6												K Kravchuk D Yevseyev	w/o
	3	J Cerretani A Shamasdin	66	4												D Popko A Vatutin
		D Popko A Vatutin	78	6					D Popko A Vatutin	6	1	[10]
		B Lock M Vervoort	2	2					A Kadhe S Mansouri	4	6	[8]
		A Kadhe S Mansouri	6	6																			K Kravchuk D Yevseyev	1	6	[5]
	WC	K Sultanov V Uzakov	3	1																		4	J de Jong S Verbeek	6	3	[10]
		V Kopřiva M Vrbenský	6	6					V Kopřiva M Vrbenský	0	3
	WC	D Golubev E Tiurnev	4	64				4	J de Jong S Verbeek	6	6
	4	J de Jong S Verbeek	6	77											4	J de Jong S Verbeek	6	77
		E Karlovskiy N Serdarušić	6	6												E Karlovskiy N Serdarušić	2	62
	Alt	J Sels T van Rijthoven	1	2					E Karlovskiy N Serdarušić	63	6	[10]
	WC	Alexander Igoshin I Nedelko	65	4				2	N Pasha M Schnur	77	3	[4]
	2	N Pasha M Schnur	77	6

• Main draw