Doubles
2021 Sofia Open
Final
Champions	Jonny O'Mara Ken Skupski
Runners-up	Oliver Marach Philipp Oswald
Score	6–3, 6–4
Details
Draw	16
Seeds	4
Events
Singles Doubles
← 2020 · ATP Sofia Open · 2022 →

Jamie Murray and Neal Skupski were the defending champions,^[1] but chose to compete in San Diego with different partners instead.

Jonny O'Mara and Ken Skupski won the title, defeating Oliver Marach and Philipp Oswald in the final, 6–3, 6–4.

	First round							Quarterfinals							Semifinals							Final
	1	H Kontinen B McLachlan	6	64	[6]
		J Erlich D Inglot	4	77	[10]				J Erlich D Inglot	2	5
		R Jebavý M Middelkoop	6	6					R Jebavý M Middelkoop	6	7
	WC	A Andreev A Lazarov	2	4												R Jebavý M Middelkoop	3	1
	4	L Saville J-P Smith	77	77												J O'Mara K Skupski	6	6
		A Göransson H Nys	64	62				4	L Saville J-P Smith	3	6	[8]
	WC	A Donski D Kuzmanov	6	5	[7]				J O'Mara K Skupski	6	2	[10]
		J O'Mara K Skupski	2	7	[10]																		J O'Mara K Skupski	6	6
		L Musetti A Vavassori	3	68																		3	O Marach P Oswald	3	4
		M Demoliner R Matos	6	710					M Demoliner R Matos	66	63
		R Bopanna A-u-H Qureshi	2	77	[7]			3	O Marach P Oswald	78	77
	3	O Marach P Oswald	6	61	[10]										3	O Marach P Oswald	2	7	[10]
		S González A Molteni	6	6												S González A Molteni	6	5	[6]
	Alt	P Milushev R Shandarov	3	4					S González A Molteni	65	6	[10]
		A Golubev A Nedovyesov	3	77	[7]			2	T Brkić N Ćaćić	77	2	[4]
	2	T Brkić N Ćaćić	6	62	[10]

• Main draw