2023 Campeonato Internacional de Tênis de Campinas

Country	Player	Rank1	Seed
ARG	Federico Coria	83	1
ARG	Juan Manuel Cerúndolo	88	2
ARG	Facundo Díaz Acosta	105	3
ARG	Francisco Comesaña	127	4
GBR	Jan Choinski	128	5
BOL	Hugo Dellien	136	6
BRA	Felipe Meligeni Alves	142	7
ARG	Camilo Ugo Carabelli	151	8

• ¹ Rankings as of 25 September 2023.^[1]

The following players received wildcards into the singles main draw:

• Enzo Lima
• Eduardo Ribeiro
• Nicolas Zanellato

The following player received entry into the singles main draw as a special exempt:

• Gustavo Heide

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

• Murkel Dellien
• Matheus Pucinelli de Almeida
• João Lucas Reis da Silva

The following players received entry from the qualifying draw:

• Daniel Dutra da Silva
• Igor Gimenez
• Wilson Leite
• Orlando Luz
• José Pereira
• Pedro Sakamoto

• Thiago Monteiro def. Camilo Ugo Carabelli 3–6, 6–4, 6–4.

• Guido Andreozzi / Guillermo Durán def. Diego Hidalgo / Cristian Rodríguez 7–6^(7–4), 6–3.