Rio Open Day 1 Results- 20 February
| Player 1 | Player 2 | Score |
| Nicolas Jarry | Lorenzo Musetti | 6-4, 6-1 |
| Alex Molcan | Joao Fonseca | 6-0, 6-3 |
| Hugo Dellien | Joao Sousa | 6-0, 6-2 |
| Laslo Djere | Facundo Bagnis | 6-2,3-2 (ret.) |
| Pedro Martinez | Cristian Garin | 7-6(0), 6-4 |
| Thiago Monteiro | Dominic Thiem | 6-1, 3-6, 7-6(2) |
Rio Open Day 2 Results- 21 February
| Player 1 | Player 2 | Score |
| Cameron Norrie | Juan Manuel Cerundolo | 7-5, 6-1 |
| Francisco Cerundolo | Roberto Carballes Baena | 4-6, 6-3, 6-3 |
| Daniel Elai Galan | Pedro Cachin | 7-6(4), 6-4 |
| Juan Pablo Varillas | Hugo Gaston | 7-5, 6-4 |
Rio Open Day 3 Results- 22 February
| Player 1 | Player 2 | Score |
| Cameron Norrie | Thiago Monteiro | 7-5, 7-5 |
| Hugo Dellien | Alex Molcan | 1-6, 6-2, 6-2 |
| Carlos Alcaraz | Mateus Alves | 6-4, 6-4 |
| Dusan Lajovic | Diego Schwartzman | 6-1, 6-4 |
| Sebastian Baez | Thomaz Bellucci | 6-3, 6-2 |
| Albert Ramos Vinolas | Tomas Marco Etcheverry | 5-7, 6-4, 6-4 |
| Fabio Fognini | Tomas Barrios Vera | 6-2, 6-3 |
| Bernabe Zapata Miralles | Jaume Munar | 6-3, 7-5 |
Rio Open Day 4 Results- 23 February
| Player 1 | Player 2 | Score |
| Carlos Alcaraz | Fabio Fognini | 6-7(5), 6-2, 6-4 |
| Bernabe Zapata Miralles | Francisco Cerundolo | 6-1, 4-6, 6-1 |
| Sebastian Baez | Juan Pablo Varillas | 7-5, 7-6(6) |
| Albert Ramos Vinolas | Daniel Elahi Galan | 6-2, 6-4 |
| Nicolas Jarry | Pedro Martinez | 6-2, 6-2 |
| Dusan Lajovic | Laslo Djere | 6-2, 6-4 |
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