| Youth B Sonderspielrunde 2023 Vorrunde - Appearances as Referee |  |
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 |
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| 23/04/2023 | Fortuna Köln | - | Borussia Dortmund | 1:6 | - | - | - |
| 26/04/2023 | SV Deutz 05 | - | Bayer Leverkusen | 1:4 | - | - | - |
| 30/04/2023 | 1. FC Köln | - | Sportfreunde Siegen | 5:0 | - | - | - |
| Youth B Sonderspielrunde 2023 Vorrunde - Appearances as Referee | |
|
|
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| 23/04/2023 | Fortuna Köln | - | Borussia Dortmund | 1:6 | - | - | - |
| 26/04/2023 | SV Deutz 05 | - | Bayer Leverkusen | 1:4 | - | - | - |
| 30/04/2023 | 1. FC Köln | - | Sportfreunde Siegen | 5:0 | - | - | - |
| Complete name: | Matti Lambertz |
| Born: | |
| Place of birth: |
Germany |
| Nationality: |
Germany |