Doubles
2018 Argentina Open
Final
Champions	Andrés Molteni Horacio Zeballos
Runners-up	Juan Sebastián Cabal Robert Farah
Score	6–3, 5–7, [10–3]
Events
Singles Doubles
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Juan Sebastián Cabal and Robert Farah were the two-time defending champions, but lost in the final to Andrés Molteni and Horacio Zeballos, 3–6, 7–5, [3–10].

	First round							Quarterfinals							Semifinals							Final
	1	JS Cabal R Farah	79	711
		M Demoliner G García López	67	69				1	JS Cabal R Farah	w/o
		F Delbonis G Pella	65	3					P Carreño Busta P Cuevas
		P Carreño Busta P Cuevas	77	6											1	JS Cabal R Farah	710	6
	3	N Mektić A Peya	6	3	[8]											D Schwartzman D Thiem	68	2
		D Marrero F Verdasco	3	6	[10]				D Marrero F Verdasco	1	4
		R Jebavý J Veselý	6	2	[3]				D Schwartzman D Thiem	6	6
		D Schwartzman D Thiem	3	6	[10]																	1	JS Cabal R Farah	3	7	[3]
		C Berlocq A Ramos Viñolas	3	3																		4	A Molteni H Zeballos	6	5	[10]
		H Podlipnik-Castillo A Vasilevski	6	6					H Podlipnik-Castillo A Vasilevski	1	5
	WC	D Descloix G Monfils	4	5				4	A Molteni H Zeballos	6	7
	4	A Molteni H Zeballos	6	7											4	A Molteni H Zeballos	77	77
	WC	G Durán M González	7	6											WC	G Durán M González	65	62
		A Bedene A Behar	5	3				WC	G Durán M González	66	6	[12]
	PR	A Haider-Maurer D Lajović	3	6	[10]			PR	A Haider-Maurer D Lajović	78	4	[10]
	2	S González J Peralta	6	3	[5]

• Main draw