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Miguel Ángel Reyes-Varela and Blaž Rola were the defending champions but chose not to defend their title.

Guido Andreozzi and Guillermo Durán won the title after defeating Ariel Behar and Gonzalo Escobar 2–6, 7–6, in the final.

Seeds

1. Andrés Molteni / Fernando Romboli (quarterfinals)
2. Martín Cuevas / Pablo Cuevas (quarterfinals)
3. Ariel Behar / Gonzalo Escobar (final)
4. Guido Andreozzi / Guillermo Durán (champions)

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	A Molteni F Romboli	6	6
	Alt	P Sakamoto T Seyboth Wild	4	2				1	A Molteni F Romboli	1	4
		F Zeballos Matías Zukas	1	6					F Zeballos M Zukas	6	6
	WC	M Echazú JA Ore	6	4												F Zeballos M Zukas	6	2
	4	G Andreozzi G Durán	6	6											4	G Andreozzi G Durán	4	6
	WC	N Álvarez JP Varillas	2	1				4	G Andreozzi G Durán	6	6
		J Hernández-Fernández O Luz	4	2					T Lipovšek Puches JI Londero	2	2
		T Lipovšek Puches JI Londero	6	6																		4	G Andreozzi G Durán	2	7
	WC	A Huertas del Pino C Huertas del Pino	4	0																		3	A Behar G Escobar	6	6
		F Agamenone F Argüello	6	6					F Agamenone F Argüello	4	6
	Alt	A Collarini F Coria	6	0				3	A Behar G Escobar	6	4
	3	A Behar G Escobar	7	6											3	A Behar G Escobar	7	4
		P Krstin M Zekić	6	2												P Sousa M Vervoort	6	6
		P Sousa M Vervoort	7	6					P Sousa M Vervoort	7	1
		F Bagnis S Galdós	4	4				2	M Cuevas P Cuevas	5	6
	2	M Cuevas P Cuevas	6	6

References

• Main draw

• 2018 ATP Challenger Tour
• Lima Challenger