2026 Challenger AAT

Country	Player	Rank1	Seed
ARG	Santiago Rodríguez Taverna	224	1
ARG	Lautaro Midón	232	2
ARG	Andrea Collarini	242	3
BOL	Murkel Dellien	247	4
PER	Juan Pablo Varillas	253	5
ARG	Nicolás Kicker	257	6
BRA	Pedro Boscardin Dias	273	7
BRA	Matheus Pucinelli de Almeida	298	8

• ¹ Rankings are as of 5 January 2026.^[1]

The following players received wildcards into the singles main draw:

• Alexis Gurmendi
• Dante Pagani
• Máximo Zeitune

The following players received entry into the singles main draw as alternates:

• Mateus Alves
• João Eduardo Schiessl

The following players received entry from the qualifying draw:

• Valerio Aboian
• Joaquín Aguilar Cardozo
• Juan Estévez
• Wilson Leite
• Ștefan Paloși
• Lucio Ratti

The following player received entry as a lucky loser:

• Bruno Kuzuhara

• Franco Agamenone def. Andrea Collarini 3–6, 6–4, 6–2.

• Mariano Kestelboim / Marcelo Zormann def. Alexandru Jecan / Bogdan Pavel 6–3, 6–4.