Doubles
2018 San Luis Open Challenger Tour
Final
Champions	Marcelo Arévalo Miguel Ángel Reyes-Varela
Runners-up	Jay Clarke Kevin Krawietz
Score	6–1, 6–4
Events
Singles Doubles
← 2017 · San Luis Open Challenger Tour · 2019 →

Roberto Quiroz and Caio Zampieri were the defending champions but only Quiroz chose to defend his title, partnering Yannick Hanfmann. Quiroz lost in the quarterfinals to Jay Clarke and Kevin Krawietz.

Marcelo Arévalo and Miguel Ángel Reyes-Varela won the title after defeating Clarke and Krawietz 6–1, 6–4 in the final.

	First round							Quarterfinals							Semifinals							Final
	1	A Krajicek J Withrow	6	6
	Alt	P Sakamoto JP Sorgi	4	4				1	A Krajicek J Withrow	w/o
		P Krstin D Muñoz de la Nava	7	6					P Krstin D Muñoz de la Nava
		A Collarini F Coria	5	2											1	A Krajicek J Withrow	3	4
	4	E King N Pasha	64	77	[6]											J Clarke K Krawietz	6	6
		Y Hanfmann R Quiroz	77	63	[10]				Y Hanfmann R Quiroz	65	6	[5]
	WC	A Gómez T Hank	4	1					J Clarke K Krawietz	77	3	[10]
		J Clarke K Krawietz	6	6																			J Clarke K Krawietz	1	4
		B Arias F Zeballos	4	77	[10]																	2	M Arévalo MÁ Reyes-Varela	6	6
		F Argüello F Bagnis	6	65	[4]				B Arias F Zeballos	6	6
	WC	E Gómez L Gómez	1	4				3	F Agamenone S Galdós	3	4
	3	F Agamenone S Galdós	6	6												B Arias F Zeballos	4	4
	WC	G López Villaseñor M Sánchez	77	6											2	M Arévalo MÁ Reyes-Varela	6	6
		LD Martínez R Statham	61	4				WC	G López Villaseñor M Sánchez	5	64
		M Krueger A Sarkissian	1	3				2	M Arévalo MÁ Reyes-Varela	7	77
	2	M Arévalo MÁ Reyes-Varela	6	6

• Main Draw