2023 Campeonato Internacional de Tênis de Campinas – Singles

Jan Choinski was the defending champion but lost in the second round to Andrea Pellegrino.

Thiago Monteiro won the title after defeating Camilo Ugo Carabelli 3–6, 6–4, 6–4 in the final.

Seeds
• # 🇦🇷 Federico Coria (second round)

• # 🇦🇷 Juan Manuel Cerúndolo (second round)

• # 🇦🇷 Facundo Díaz Acosta (second round)

• # 🇦🇷 Francisco Comesaña (second round, retired)

• # 🇬🇧 Jan Choinski (second round)

• # 🇧🇴 Hugo Dellien (quarterfinals)

• # 🇧🇷 Felipe Meligeni Alves (second round)

• # 🇦🇷 Camilo Ugo Carabelli (final)