| Brazil U20 League | 2019/03/26 18:30 | Uniao Harmonia U20 v SERC Brasil U20 | W | 1-3 |
| Brazil U20 League | 2022/05/02 18:00 | Sapucaiense RS U20 v SERC Brasil U20 | L | 2-0 |
| Brazil U20 League | 2021/10/22 17:00 | Operario FC U20 v SERC Brasil U20 | L | 3-2 |
| Brazil U20 League | 2019/06/13 22:30 | SERC Brasil U20 v Sao Jose EC U20 | L | 0-1 |
| Brazil U20 League | 2019/06/10 18:00 | Sao Jose EC U20 v SERC Brasil U20 | D | 1-1 |
| Brazil U20 League | 2019/06/05 18:02 | SERC Brasil U20 v Gremio U20 | W | 1-0 |
| Brazil U20 League | 2019/06/05 18:00 | SERC Brasil U20 v Brasil de Pelotas U20 | W | 1-0 |
| Brazil U20 League | 2019/05/29 18:00 | Novo Horizonte U20 v SERC Brasil U20 | W | 0-2 |
| Brazil U20 League | 2019/05/26 18:00 | SERC Brasil U20 v Sao Jose EC U20 | W | 1-0 |
| 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 | 2021/11/03 18:00 | Sao Gabriel U20 v Uniao Harmonia U20 | L | 6-2 |