2019 Challenger de Buenos Aires – Doubles

Guido Andreozzi and Guillermo Durán were the defending champions but only Andreozzi chose to defend his title, partnering Andrés Molteni. Andreozzi successfully defended his title.

Andreozzi and Molteni won the title after defeating Hugo Dellien and Federico Zeballos 6–7, 6–2, in the final.

Seeds

First round				Quarterfinals				Semifinals				Final

1	G Andreozzi A Molteni	7	6
	F Cerúndolo MF Descotte	6	3	1	G Andreozzi A Molteni	6	6
	F Coria S Nagal	6	6		F Coria S Nagal	2	3
	T Monteiro P Sakamoto	1	2					1	G Andreozzi A Molteni	6	6
3	LD Martínez F Meligeni Alves	7	5					3	LD Martínez F Meligeni Alves	7	4
	S Galdós JP Varillas	6	7	3	LD Martínez F Meligeni Alves	7	6
WC	Mariano Kestelboim Matías Zukas	6	6	WC	S Báez JM Cerúndolo	5	7
WC	S Báez JM Cerúndolo	7	4									1	G Andreozzi A Molteni	6	6
	R Matos T Seyboth Wild	6	3									4	H Dellien F Zeballos	7	2
	Maximiliano Estévez J Hernández-Fernández	3	6		M Estévez J Hernández-Fernández	3	1
WC	JP Ficovich C Ugo Carabelli	4	7	4	H Dellien F Zeballos	6	6
4	H Dellien F Zeballos	6	6					4	H Dellien F Zeballos	3	6
	O Luz J Menezes	4	7					2	MÁ Reyes-Varela F Romboli	6	3
	M Cuevas F Mena	6	6		O Luz J Menezes	7	6
	F Bagnis R Olivo	6	3	2	MÁ Reyes-Varela F Romboli	6	7
2	MÁ Reyes-Varela F Romboli	3	6