| Spain Int Qual | 2021/06/16 12:20 | Shamsul Muzli, Muhammad Izzuddin v Thomas Fourcade | W | 1-2 |
| Lithuanian Int. | 2021/06/12 09:00 | Thomas Fourcade v Bar Netzer, M. | L | 1-2 |
| Lithuanian Int. | 2021/06/11 10:20 | Koenig, Joel v Thomas Fourcade | W | 0-2 |
| Lithuanian Int. Qual | 2021/06/10 15:00 | Thomas Fourcade v Berzanskis, Danielius | W | 2-0 |
| Lithuanian Int. Qual | 2021/06/10 14:00 | Thomas Fourcade v Rafael Gavois | W | 2-0 |
| Lithuanian Int. Qual | 2021/06/10 10:40 | Thomas Fourcade v Christian Tomic | W | 2-0 |
| Austrian Open - Qualif. | 2021/05/27 09:25 | Alex Lanier v Thomas Fourcade | L | 2-1 |
| Slovenia Int. | 2021/05/20 14:00 | Enogat Roy v Thomas Fourcade | L | 2-1 |
| 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 |
| Open de Pologne - Qualif. | 2021/03/25 18:40 | Piris, Carlos v Koenig, Joel | W | 2-0 |
| Open de Pologne - Qualif. | 2021/03/25 17:10 | Piris, Carlos v Karl Kert | W | 2-0 |
| Open de Pologne - Qualif. | 2021/03/25 12:00 | Piris, Carlos v Szymon Stokfisz | W | 2-0 |