| Youth Bundesliga Nord/Nordost 2012/2013 - Appearances as Assistant | ||||
| 12/08/2012 | VfL Wolfsburg | - | Rot-Weiß Erfurt | 3:2 |
| 09/02/2013 | Hallescher FC | - | Hannover 96 | 5:1 |
| 14/04/2013 | VfL Wolfsburg | - | Holstein Kiel | 6:1 |
| Youth Bundesliga Nord/Nordost 2012/2013 - Appearances as Assistant | ||||
| 12/08/2012 | VfL Wolfsburg | - | Rot-Weiß Erfurt | 3:2 |
| 09/02/2013 | Hallescher FC | - | Hannover 96 | 5:1 |
| 14/04/2013 | VfL Wolfsburg | - | Holstein Kiel | 6:1 |
| Complete name: | Julius Martenstein |
| Born: | 16/10/1991 |
| Place of birth: |
Germany |
| Residence: | Marburg |
| Nationality: |
Germany |