2021 Sparkassen Open – Doubles

Simone Bolelli and Guillermo Durán were the defending champions but only Durán chose to defend his title, partnering Tim Sandkaulen. Durán lost in the quarterfinals to Szymon Walków and Jan Zieliński.

Walków and Zieliński won the title after defeating Ivan and Matej Sabanov 6–4, 4–6, in the final.

Seeds

First round				Quarterfinals				Semifinals				Final

1	I Sabanov M Sabanov	6	4
Alt	M Gengel Dominik Langmajer	1	6	1	I Sabanov M Sabanov	3
	K Drzewiecki K Żuk	6	7		K Drzewiecki K Żuk	0
WC	N Kuhn M Möller	3	5					1	I Sabanov M Sabanov	6	6
3	Z Kolář A Olivetti	7	6						I Sijsling G Smits	1	2
	D Hidalgo S Martos Gornés	5	7		D Hidalgo S Martos Gornés	6	3
	T Gabashvili A Kadhe	4	5		I Sijsling G Smits	4	6
	I Sijsling G Smits	6	7									1	I Sabanov M Sabanov	4	6
WC	G Durán T Sandkaulen	6	6										S Walków J Zieliński	6	4
WC	Nino Ehrenschneider Lewie Lane	2	2	WC	G Durán T Sandkaulen	5	4
	S Walków J Zieliński	6	6		S Walków J Zieliński	7	6
4	J Cerretani I Zelenay	3	4						S Walków J Zieliński	w/o
	S Ehrat Lucas Gerch	6	7					2	F Romboli D Vega Hernández
	S Balaji L Margaroli	4	6		S Ehrat L Gerch	4	4
	Z Bergs M Geerts	6	2	2	F Romboli D Vega Hernández	6	6
2	F Romboli D Vega Hernández	7	6