| U21 EURO Qualifiers 2021/2022 - Appearances as Assistant | ||||
| 03/09/2021 | Spain | - | Russia | 4:1 annull. |
| 11/10/2021 | Albania | - | Slovenia | 2:0 |
| 09/06/2022 | Sweden | - | Italy | 1:1 |
| 27/09/2022 | Israel | - | Ireland | 3:1 pso |
| U21 EURO Qualifiers 2021/2022 - Appearances as Assistant | ||||
| 03/09/2021 | Spain | - | Russia | 4:1 annull. |
| 11/10/2021 | Albania | - | Slovenia | 2:0 |
| 09/06/2022 | Sweden | - | Italy | 1:1 |
| 27/09/2022 | Israel | - | Ireland | 3:1 pso |
| Complete name: | Mathias Hillaert |
| Born: | 20/08/1988 |
| Place of birth: |
Belgium |
| Nationality: |
Belgium |