2021 Open de Oeiras II – Doubles

This was the second of four editions of the tournament in the 2021 ATP Challenger Tour calendar.^[1]

Doubles
2021 Open de Oeiras II
Champions	Nuno Borges Francisco Cabral
Runners-up	Pavel Kotov Tseng Chun-hsin
Score	6–1, 6–2

Main article: 2021 Open de Oeiras II

Mats Moraing and Oscar Otte were the defending champions but withdrew from the tournament before their first round match.

Nuno Borges and Francisco Cabral won the title after defeating Pavel Kotov and Tseng Chun-hsin 6–1, 6–2 in the final.

Seeds

1. Enzo Couacaud / Manuel Guinard (quarterfinals)
2. Harry Bourchier / Sergio Galdós (quarterfinals)
3. Hunter Johnson / Yates Johnson (first round)
4. Gonçalo Falcão / Denis Yevseyev (first round)

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	E Couacaud M Guinard	6	6
		D-h Lee G Oliveira	0	2				1	E Couacaud M Guinard	3	7	[6]
		N Chappell V Orlov	w/o						N Chappell V Orlov	6	5	[10]
		M Moraing O Otte														N Chappell V Orlov	2	1
	4	Gonçalo Falcão D Yevseyev	6	4	[9]											N Borges F Cabral	6	6
		M Rosenkranz Tom Schönenberg	3	6	[11]				M Rosenkranz T Schönenberg	65	1
		N Borges F Cabral	6	6					N Borges F Cabral	77	6
	WC	Eduardo Morais Vasco Prata	1	3																			N Borges F Cabral	6	6
	WC	Miguel Gomes H Rocha	1	2																			P Kotov C-h Tseng	1	2
		E Escobedo L Miedler	6	6					E Escobedo L Miedler	w/o
		R Brancaccio Eduard Esteve Lobato	2	6	[10]				R Brancaccio E Esteve Lobato
	3	H Johnson Y Johnson	6	2	[5]											E Escobedo L Miedler	6	2	[6]
	WC	J Faria Tiago Torres	2	4												P Kotov C-h Tseng	4	6	[10]
		P Kotov C-h Tseng	6	6					P Kotov C-h Tseng	6	6
		GM Moroni R Ortega Olmedo						2	H Bourchier S Galdós	4	4
	2	H Bourchier S Galdós	w/o