| Brazil U20 League | 2021/10/15 18:00 | Gremio Nacional U20 v Uniao Harmonia U20 | W | 0-2 |
| 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 | 2021/11/03 18:00 | Sao Gabriel U20 v Uniao Harmonia U20 | L | 6-2 |
| Brazil U20 League | 2021/10/26 18:00 | Uniao Harmonia U20 v SC Doze Horas U20 | L | 0-1 |
| Brazil U20 League | 2021/10/15 18:00 | Gremio Nacional U20 v Uniao Harmonia U20 | W | 0-2 |
| Brazil U20 League | 2021/10/11 18:00 | Uniao Harmonia U20 v Atletico Clube Sulbrasil U20 | L | 0-6 |
| Brazil U20 League | 2021/10/05 18:00 | Riopardense U20 v Uniao Harmonia U20 | D | 1-1 |
| Brazil U20 League | 2021/11/18 18:30 | Gremio Nacional U20 v SC Jau U20 | L | 1-7 |
| Brazil U20 League | 2021/11/15 18:30 | Sao Gabriel U20 v Gremio Nacional U20 | D | 1-1 |
| Brazil U20 League | 2021/11/11 18:30 | Gremio Nacional U20 v SC Doze Horas U20 | L | 4-6 |
| Brazil U20 League | 2021/10/29 18:00 | Gremio Nacional U20 v Atletico Clube Sulbrasil U20 | L | 1-5 |
| Brazil U20 League | 2021/10/25 18:00 | Riopardense U20 v Gremio Nacional U20 | W | 0-8 |
| Brazil U20 League | 2021/10/15 18:00 | Gremio Nacional U20 v Uniao Harmonia U20 | L | 0-2 |
| Brazil U20 League | 2021/10/08 18:00 | SC Jau U20 v Gremio Nacional U20 | D | 1-1 |
| Brazil U20 League | 2021/10/06 18:00 | Gremio Nacional U20 v Sao Gabriel U20 | W | 6-0 |