| Spain Int | 2021/06/18 10:00 | Piris, Carlos v Ygor Coelho | L | 1-2 |
| Spain Int | 2021/06/17 15:40 | Ludik, Milan v Piris, Carlos | W | 0-2 |
| Spain Int Qual | 2021/06/17 07:40 | Thomas Fourcade v Piris, Carlos | W | 0-2 |
| Spain Int Qual | 2021/06/16 15:25 | Richard Kuhl v Piris, Carlos | W | 0-2 |
| Spain Int Qual | 2021/06/16 07:20 | Ramnish Kumar v Piris, Carlos | W | 0-2 |
| Masters d'Espagne | 2021/05/19 08:40 | Burestedt, Felix v Piris, Carlos | L | 2-0 |
| Portuguese Int. Qual | 2021/05/06 12:00 | Thoegersen, M. v Piris, Carlos | L | 2-0 |
| Open de Pologne | 2021/03/26 12:50 | Tze Yong Ng v Piris, Carlos | L | 2-0 |
| Denmark Masters Qual | 2021/08/05 07:40 | Thoegersen, M. v Nilsson, Jacob | L | 2-0 |
| Austrian Open | 2021/05/29 10:40 | Kevin Cordon v Nilsson, Jacob | L | 2-0 |
| Austrian Open | 2021/05/28 13:20 | Nilsson, Jacob v Ivancic, Miha | W | 2-0 |
| Slovenia Int. | 2021/05/20 09:00 | Arnaud Merkle v Nilsson, Jacob | L | 2-0 |
| Portuguese Int. | 2021/05/08 08:20 | Torjussen, J. v Nilsson, Jacob | L | 2-0 |
| Portuguese Int. | 2021/05/07 14:30 | Nilsson, Jacob v Mads Juel Moller | W | 2-0 |
| Portuguese Int. Qual | 2021/05/07 08:20 | Bundgaard, Martin v Nilsson, Jacob | W | 1-2 |
| Portuguese Int. Qual | 2021/05/06 16:30 | Nilsson, Jacob v Stoynov, Ilyan | W | 2-0 |