Doubles
2017 Challenger ATP Cachantún Cup
Final
Champions	Marcelo Tomás Barrios Vera Nicolás Jarry
Runners-up	Máximo González Andrés Molteni
Score	6–4, 6–3
Events
Singles Doubles
← 2016 · Challenger ATP Cachantún Cup · 2018 →

Julio Peralta and Hans Podlipnik-Castillo were the defending champions but chose to defend their title with different partners. Peralta partnered Íñigo Cervantes but lost in the first round to Fabiano de Paula and Fabrício Neis. Podlipnik-Castillo partnered Max Schnur but lost in the first round to Marcelo Tomás Barrios Vera and Nicolás Jarry.

Barrios Vera and Jarry won the title after defeating Máximo González and Andrés Molteni 6–4, 6–3 in the final.

	First round							Quarterfinals							Semifinals							Final
	1	M González A Molteni	6	6
		T Daniel R Ramírez Hidalgo	2	4				1	M González A Molteni	6	6
		F Argüello F Coria	4	5					C Garin J Hernández-Fernández	2	4
		C Garin J Hernández-Fernández	6	7											1	M González A Molteni	4	7	[10]
	3	Í Cervantes J Peralta	2	4											WC	E Gómez JI Londero	6	5	[7]
		F de Paula F Neis	6	6					F de Paula F Neis	4	2
	WC	E Gómez JI Londero	77	77				WC	E Gómez JI Londero	6	6
		M Bourgue M Janvier	64	65																		1	M González A Molteni	4	3
	WC	O Luz M Zormann	1																			WC	MT Barrios Vera N Jarry	6	6
		D Dutra da Silva B Sant'Anna	3r					WC	O Luz M Zormann	7	7
		M Felder T Lamasine	3	68				4	S Galdós C Zampieri	5	5
	4	S Galdós C Zampieri	6	710											WC	O Luz M Zormann	78	5	[7]
		R Dutra Silva E Russi Assumpção	3	1											WC	MT Barrios Vera N Jarry	66	7	[10]
		G Andreozzi J Souza	6	6					G Andreozzi J Souza
	WC	MT Barrios Vera N Jarry	64	711	[10]			WC	MT Barrios Vera N Jarry	w/o
	2	H Podlipnik-Castillo M Schnur	77	69	[3]

• Main Draw