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Máximo González and Fabrício Neis were the defending champions but only Neis chose to defend his title, partnering Rafael Matos. Neis lost in the quarterfinals to Thiago Monteiro and Pedro Sakamoto.

Hugo Dellien and Guillermo Durán won the title after defeating Franco Agamenone and Fernando Romboli 7–5, 6–4 in the final.

Seeds

1. Franco Agamenone / Fernando Romboli (final)
2. Hugo Dellien / Guillermo Durán (champions)
3. Rafael Matos / Fabrício Neis (quarterfinals)
4. Caio Silva / Thales Turini (semifinals)

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
• NG = Next Gen Accelerator Program entrant

	First round							Quarterfinals							Semifinals							Final
	1	F Agamenone F Romboli	6	6
	WC	Christian Oliveira T Seyboth Wild	0	4				1	F Agamenone F Romboli	7	6
		F Argüello H Casanova	4	6					F Coria C Garín	5	2
		F Coria C Garín	6	7											1	F Agamenone F Romboli	7	6
	4	Caio Silva T Turini	6	6											4	C Silva T Turini	6	3
		P Cachin M Cuevas	7	3				4	C Silva T Turini	w/o
	PR	A Collarini F Mena	2	2					F Bagnis C Berlocq
		F Bagnis C Berlocq	6	6																		1	F Agamenone F Romboli	5	4
	WC	Breno Lodis M Pucinelli de Almeida	3	3																		2	H Dellien G Durán	7	6
		T Monteiro P Sakamoto	6	6					T Monteiro P Sakamoto	7	6
		G Clezar A González						3	R Matos F Neis	6	7
	3	R Matos F Neis	w/o													T Monteiro P Sakamoto
	WC	F Meligeni Alves JP Sorgi	4	6											2	H Dellien G Durán	w/o
		T Lipovšek Puches JI Londero	6	7					T Lipovšek Puches JI Londero	6	3
		G Elias O Luz	4	3				2	H Dellien G Durán	7	6
	2	H Dellien G Durán	6	6

References

• Main draw

• 2018 ATP Challenger Tour
• Campeonato Internacional de Tênis do Estado do Pará