| Brazil U20 League | 2021/09/12 18:00 | Atletico Clube Sulbrasil U20 v SC Doze Horas U20 | L | 2-1 |
| Brazil U20 League | 2021/11/01 18:00 | SC Doze Horas U20 v Riopardense U20 | W | 4-0 |
| Brazil U20 League | 2021/10/26 18:00 | Uniao Harmonia U20 v SC Doze Horas U20 | W | 0-1 |
| Brazil U20 League | 2021/10/19 18:00 | SC Doze Horas U20 v SC Jau U20 | L | 2-4 |
| Brazil U20 League | 2021/10/12 18:00 | Sao Gabriel U20 v SC Doze Horas U20 | L | 3-1 |
| Brazil U20 League | 2021/09/27 18:00 | SC Doze Horas U20 v Gremio Nacional U20 | W | 1-0 |
| Brazil U20 League | 2021/09/12 18:00 | Atletico Clube Sulbrasil U20 v SC Doze Horas U20 | L | 2-1 |
| Brazil U20 League | 2021/10/29 18:00 | Gremio Nacional U20 v Atletico Clube Sulbrasil U20 | W | 1-5 |
| Brazil U20 League | 2021/10/18 18:00 | Atletico Clube Sulbrasil U20 v Riopardense U20 | W | 5-0 |
| Brazil U20 League | 2021/10/11 18:00 | Uniao Harmonia U20 v Atletico Clube Sulbrasil U20 | W | 0-6 |
| Brazil U20 League | 2021/10/04 18:00 | Atletico Clube Sulbrasil U20 v SC Jau U20 | W | 2-1 |
| Brazil U20 League | 2021/09/28 18:00 | Sao Gabriel U20 v Atletico Clube Sulbrasil U20 | W | 0-1 |
| Brazil U20 League | 2021/09/12 18:00 | Atletico Clube Sulbrasil U20 v SC Doze Horas U20 | W | 2-1 |
| Brazil U20 Cup | 2021/07/10 13:00 | Cruzeiro RS U20 v Atletico Clube Sulbrasil U20 | L | 4-2 |
| Brazil U20 Cup | 2021/06/21 18:00 | CE Bento Goncalves RS U20 v Atletico Clube Sulbrasil U20 | L | 2-0 |