2026 Rio Open – Singles
| Singles | |
|---|---|
| 2026 Rio Open | |
| Champion | Tomás Martín Etcheverry |
| Runner-up | Alejandro Tabilo |
| Score | 3–6, 7–6(7–3), 6–4 |
| Draw | 32 (4 Q / 3 WC ) |
| Seeds | 8 |
Tomás Martín Etcheverry defeated Alejandro Tabilo in the final, 3–6, 7–6(7–3), 6–4 to win the singles tennis title at the 2026 Rio Open. It was his first ATP Tour title.
Sebastián Báez was the two-time defending champion, but lost in the first round to Jaime Faria.