2023 Curitiba Challenger

Country	Player	Rank1	Seed
ARG	Juan Manuel Cerúndolo	99	1
ARG	Thiago Agustín Tirante	111	2
ARG	Francisco Comesaña	117	3
CZE	Vít Kopřiva	122	4
BOL	Hugo Dellien	129	5
BRA	Felipe Meligeni Alves	142	6
ARG	Mariano Navone	146	7
ARG	Camilo Ugo Carabelli	148	8
ITA	Luciano Darderi	157	9

• ¹ Rankings are as of 16 October 2023.^[1]

The following players received wildcards into the singles main draw:

• Gustavo Ribeiro de Almeida
• Wilson Leite
• Orlando Luz

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

• Carlos Taberner

The following players received entry from the qualifying draw:

• Mateus Alves
• Pedro Boscardin Dias
• Daniel Dutra da Silva
• Arklon Huertas del Pino
• Gilbert Klier Júnior
• Nicolas Zanellato

• Hugo Dellien def. Oliver Crawford 7–6^(8–6), 4–6, 7–6^(7–1).

• Guido Andreozzi / Ignacio Carou def. Diego Hidalgo / Cristian Rodríguez 6–4, 6–4.