2023 Aberto da República – Singles

Federico Coria was the defending champion but chose not to defend his title.

Alejandro Tabilo won the title after defeating Román Andrés Burruchaga 6–3, 7–6(8–6) in the final.

Seeds
• # Cristian Garín (quarterfinals)

• # Tomás Barrios Vera (first round)

• # 🇧🇴 Hugo Dellien (withdrew)

• # 🇺🇸 Aleksandar Kovacevic (first round)

• # 🇦🇷 Thiago Agustín Tirante (quarterfinals)

• # 🇧🇷 Thiago Monteiro (withdrew)

• # 🇺🇸 Nicolas Moreno de Alboran (second round)

• # 🇦🇷 Guido Andreozzi (first round)

• # 🇺🇸 Oliver Crawford (first round)