2019 Challenger de Buenos Aires

Country	Player	Rank1	Seed
ARG	Federico Delbonis	71	1
BOL	Hugo Dellien	83	2
ARG	Leonardo Mayer	99	3
BRA	Thiago Monteiro	103	4
ARG	Guido Andreozzi	113	5
ARG	Federico Coria	153	6
IND	Sumit Nagal	159	7
ARG	Facundo Bagnis	164	8
ARG	Facundo Mena	195	9
BRA	João Menezes	202	10
ARG	Andrea Collarini	219	11
DOM	José Hernández-Fernández	260	12
ARG	Francisco Cerúndolo	263	13
ARG	Renzo Olivo	267	14
ARG	Matías Franco Descotte	296	15
BRA	Thiago Seyboth Wild	334	16

• ¹ Rankings are as of September 16, 2019.^[1]

The following players received wildcards into the singles main draw:

• Sebastián Báez
• Román Andrés Burruchaga
• Juan Manuel Cerúndolo
• Facundo Díaz Acosta
• Thiago Agustín Tirante

The following player received entry into the singles main draw as an alternate:

• Rafael Matos

The following players received entry from the qualifying draw:

• Tomás Farjat
• Federico Zeballos

• Sumit Nagal def. Facundo Bagnis 6–4, 6–2.

• Guido Andreozzi / Andrés Molteni def. Hugo Dellien / Federico Zeballos 6–7^(3–7), 6–2, [10–1].