2023 Aberto da República

The 2023 Aberto da República was a professional tennis tournament played on outdoor hard courts. It was the second edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Brasília, Brazil between 20 and 26 November 2023.

Seeds

 * 1 Rankings are as of 13 November 2023.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇧🇷 João Fonseca
 * 🇧🇷 Gilbert Klier Júnior
 * 🇧🇷 Eduardo Ribeiro

The following players received entry into the singles main draw as alternates:
 * Benjamin Lock
 * 🇧🇷 Orlando Luz

The following players received entry from the qualifying draw:
 * 🇵🇪 Gonzalo Bueno
 * 🇵🇪 Ignacio Buse
 * 🇧🇷 Wilson Leite
 * 🇧🇷 Fernando Romboli
 * 🇧🇷 Pedro Sakamoto
 * Alejandro Tabilo

The following players received entry as lucky losers:
 * 🇧🇷 Mateus Alves
 * 🇯🇲 Blaise Bicknell

Singles

 * Alejandro Tabilo def. 🇦🇷 Román Andrés Burruchaga 6–3, 7–6(8–6).

Doubles

 * 🇨🇴 Nicolás Barrientos / 🇸🇪 André Göransson def. 🇧🇷 Marcelo Demoliner / 🇧🇷 Rafael Matos 7–6(7–3), 4–6, [11–9].