See main article: 2019 Rio Open.
Laslo Đere won the title – the first of his career – defeating Félix Auger-Aliassime in the final, 6–3, 7–5. No seeded players reached the quarterfinals, and only one seed (João Sousa) won his first-round match.
Diego Schwartzman was the defending champion,[1] but he retired in the first round against Pablo Cuevas.
