| Brazil U20 Liga | 2021/08/04 21:00 | EC Flamengo Piaui - U20 v Piaui - U20 | L | 0-1 |
| Brazil U20 Liga | 2021/07/11 21:15 | Piaui - U20 v EC Flamengo Piaui - U20 | D | 0-0 |
| Brazil U20 Liga | 2021/07/11 21:00 | Piaui - U20 v EC Flamengo Piaui - U20 | D | 0-0 |
| Brazil U20 Liga | 2021/08/19 19:00 | River AC - U20 v EC Flamengo Piaui - U20 | L | 2-1 |
| Brazil U20 Liga | 2021/08/13 21:00 | EC Flamengo Piaui - U20 v Fluminense PI - U20 | D | 1-1 |
| Brazil U20 Liga | 2021/08/07 19:00 | Picos - U20 v EC Flamengo Piaui - U20 | D | 1-1 |
| Brazil U20 Liga | 2021/08/04 21:00 | EC Flamengo Piaui - U20 v Piaui - U20 | L | 0-1 |
| Brazil U20 Liga | 2021/07/31 21:00 | EC Timon - U20 v EC Flamengo Piaui - U20 | W | 0-1 |
| Brazil U20 Liga | 2021/07/31 21:00 | EC Timon PI U20 v EC Flamengo Piaui - U20 | W | 0-1 |
| Brazil U20 Liga | 2021/07/26 21:00 | EC Flamengo Piaui - U20 v River AC - U20 | D | 1-1 |
| Brazil U20 Liga | 2021/07/21 21:00 | Fluminense PI - U20 v EC Flamengo Piaui - U20 | L | 1-0 |
| Brazil U20 Liga | 2022/07/06 21:00 | Piaui - U20 v Comercial PI - U20 | D | 0-0 |
| Brazil U20 Liga | 2022/06/29 21:00 | Piaui - U20 v AE Altos - U20 | L | 0-1 |
| Brazil U20 Liga | 2021/08/18 21:00 | Fluminense PI - U20 v Piaui - U20 | W | 1-2 |
| Brazil U20 Liga | 2021/08/14 19:00 | Piaui - U20 v Picos - U20 | L | 0-3 |
| Brazil U20 Liga | 2021/08/09 21:00 | Piaui - U20 v EC Timon - U20 | L | 0-1 |
| Brazil U20 Liga | 2021/08/04 21:00 | EC Flamengo Piaui - U20 v Piaui - U20 | W | 0-1 |
| Brazil U20 Liga | 2021/08/01 19:00 | Piaui - U20 v River AC - U20 | L | 1-3 |
| Brazil U20 Liga | 2021/07/24 19:00 | Piaui - U20 v Fluminense PI - U20 | D | 1-1 |