2019 Rio Open – Singles
| Singles | |
|---|---|
| 2019 Rio Open | |
| Champion | Laslo Đere |
| Runner-up | Félix Auger-Aliassime |
| Score | 6–3, 7–5 |
| Draw | 32 (4 Q / 3 WC ) |
| Seeds | 8 |
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, but he retired in the first round against Pablo Cuevas.