Doubles
2021 Sibiu Open
Champions	Alexander Erler Lucas Miedler
Runners-up	James Cerretani Luca Margaroli
Score	6–3, 6–1

Hunter Reese and Jan Zieliński were the defending champions^[1] but chose not to defend their title.

Alexander Erler and Lucas Miedler won the title after defeating James Cerretani and Luca Margaroli 6–3, 6–1 in the final.

Seeds

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• SE = Special exempt
• PR = Protected ranking
• ITF = ITF entry
• JE = Junior exempt
• w/o = Walkover
• r = Retired
• d = Defaulted
• SR = Special ranking

	First round							Quarterfinals							Semifinals							Final
	1	J Cerretani L Margaroli	4
		Elmar Ejupovic E Kırkın	2r					1	J Cerretani L Margaroli	3	6	[10]
		O Krutykh David Poljak	w/o						O Krutykh D Poljak	6	0	[6]
		A Vatutin Kai Wehnelt													1	J Cerretani L Margaroli	6	5	[10]
	4	VV Cornea P Tsitsipas	w/o													G Blancaneaux A Kadhe	4	7	[7]
		U Ignatik ND Ionel						4	VV Cornea P Tsitsipas	5	2
		Yan Bondarevskiy O Prihodko	79	5	[9]				G Blancaneaux A Kadhe	7	6
		G Blancaneaux A Kadhe	67	7	[11]																	1	J Cerretani L Margaroli	3	1
		DN Mădăraș D Petrović																				2	A Erler L Miedler	6	6
		R Albot M Copil	w/o						R Albot M Copil	4	2
		A Jecan FC Jianu	5	2				3	R Gonzales H Johnson	6	6
	3	R Gonzales H Johnson	7	6											3	R Gonzales H Johnson	3	5
	WC	Vlad Andrei Dancu Sebastian Gima	77	2	[10]										2	A Erler L Miedler	6	7
	WC	Bogdan Ionuț Apostol N Frunză	62	6	[7]			WC	VA Dancu S Gima	5	2
	WC	Ștefan Paloși Marc Popescu	0	3				2	A Erler L Miedler	7	6
	2	A Erler L Miedler	6	6

References

External links

• Main draw