2021 Lisboa Belém Open – Men's doubles

Roberto Cid Subervi and Gonçalo Oliveira were the defending champions^[1] but only Oliveira chose to defend his title, partnering Andrej Martin. Oliveira withdrew before the start of the tournament due to an injury.

Men's doubles
2021 Lisboa Belém Open
Champions	Jeevan Nedunchezhiyan Purav Raja
Runners-up	Nuno Borges Francisco Cabral
Score	7–6(7–5), 6–3

Main article: 2021 Lisboa Belém Open

Jeevan Nedunchezhiyan and Purav Raja won the title after defeating Nuno Borges and Francisco Cabral 7–6^(7–5), 6–3 in the final.

Seeds

1. Jeevan Nedunchezhiyan / Purav Raja (champions)
2. Marco Bortolotti / Andrea Pellegrino (quarterfinals)
3. Andrej Martin / Gonçalo Oliveira (withdrew)
4. Sadio Doumbia / Hugo Gaston (withdrew)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• ITF = ITF entry
• PR = Protected ranking
• SR = Special ranking
• SE = Special exempt
• JE = Junior exempt
• JR = Junior Accelerator Programme entrant
• CO = College Accelerator Programme entrant
• NG = Next Gen Accelerator Program entrant
• w/o = Walkover
• r = Retired
• d = Defaulted

	First round							Quarterfinals							Semifinals							Final
	1	J Nedunchezhiyan P Raja	6	6
	WC	T Cação Gonçalo Falcão	3	2				1	J Nedunchezhiyan P Raja	6	6
		L Patiño S Rodríguez Taverna	4	3					F Forti G Zeppieri	3	4
		F Forti G Zeppieri	6	6											1	J Nedunchezhiyan P Raja	4	6	[10]
															WC	J Faria L Faria	6	3	[5]
	WC	J Faria Luís Faria	6	6				WC	J Faria L Faria
		I Sijsling G Smits	4	3																		1	J Nedunchezhiyan P Raja	77	6
	WC	Miguel Gomes H Rocha	3	3																			N Borges F Cabral	65	3
		N Borges F Cabral	6	6					N Borges F Cabral	6	6
		M Geerts M Vervoort	3	2				Alt	S Fanselow L Gerch	4	4
	Alt	S Fanselow Lucas Gerch	6	6												N Borges F Cabral	6	6
		T Lamasine A Müller	611	2												F Fallert P Heller	2	2
		F Fallert Peter Heller	713	6					F Fallert P Heller	6	6
		B Bobrov K Uchida	64	4				2	M Bortolotti A Pellegrino	1	2
	2	M Bortolotti A Pellegrino	77	6