2021 Campeonato Internacional de Tênis de Campinas

The 2021 Campeonato Internacional de Tênis de Campinas was a professional tennis tournament played on clay courts. It was the tenth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Campinas, Brazil between 15 and 21 November 2021.

Seeds

 * 1 Rankings as of 8 November 2021.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇧🇷 Matheus Bueres
 * 🇧🇷 Gustavo Heide
 * 🇧🇷 Gilbert Klier Júnior

The following players received entry into the singles main draw as alternates:
 * 🇧🇷 Orlando Luz
 * 🇧🇷 Matheus Pucinelli de Almeida

The following players received entry from the qualifying draw:
 * 🇵🇪 Nicolás Álvarez
 * 🇪🇸 Nicolás Álvarez Varona
 * Johan Nikles
 * 🇦🇷 Santiago Rodríguez Taverna

Singles

 * 🇦🇷 Sebastián Báez def. 🇧🇷 Thiago Monteiro 6–1, 6–4.

Doubles

 * 🇧🇷 Rafael Matos / 🇧🇷 Felipe Meligeni Alves def. 🇧🇷 Gilbert Klier Júnior / 🇧🇷 Matheus Pucinelli de Almeida 6–3, 6–1.