| Brazil U20 League | 2022/05/05 20:00 | SERC Brasil U20 v Uniao Harmonia U20 | L | 3-1 |
| Brazil U20 League | 2022/04/30 18:00 | APAFUT U20 v Uniao Harmonia U20 | L | 1-0 |
| Brazil U20 League | 2022/04/25 18:00 | Uniao Harmonia U20 v Sapucaiense RS U20 | L | 0-2 |
| Brazil U20 League | 2021/11/26 14:00 | SC Doze Horas U20 v Uniao Harmonia U20 | L | 7-1 |
| Brazil U20 League | 2021/11/22 14:00 | Uniao Harmonia U20 v Gremio Nacional U20 | L | 1-2 |
| Brazil U20 League | 2021/11/19 18:30 | Atletico Clube Sulbrasil U20 v Uniao Harmonia U20 | L | 2-0 |
| Brazil U20 League | 2021/11/15 14:00 | Uniao Harmonia U20 v Riopardense U20 | W | 2-0 |
| Brazil U20 League | 2021/11/06 16:00 | SC Jau U20 v Uniao Harmonia U20 | L | 3-2 |
| Brazil U20 League | 2021/12/12 18:30 | Brasil de Pelotas U20 v Riograndense U20 | D | 2-2 |
| Brazil U20 League | 2021/12/07 18:30 | Atletico Clube Sulbrasil U20 v Riograndense U20 | W | 1-3 |
| Brazil U20 League | 2021/11/27 18:30 | Uniao Frederiquense U20 v Riograndense U20 | L | 3-0 |
| Brazil U20 League | 2021/11/23 18:30 | Riograndense U20 v Passo Fundo U20 | L | 0-4 |
| Brazil U20 League | 2021/11/21 18:00 | Riograndense U20 v Passo Fundo U20 | L | 0-4 |
| Brazil U20 League | 2021/11/10 18:58 | Santo Angelo U20 v Riograndense U20 | W | 0-2 |
| Brazil U20 League | 2021/11/06 18:30 | Riograndense U20 v SC Ivoti U20 | W | 2-0 |
| Brazil U20 League | 2021/11/02 18:00 | Riograndense U20 v Uniao Frederiquense U20 | L | 0-1 |