Stadium: Court 1 Oberhaching Round: 25 Ground: Carpet indoor
| Challenger Pullach Qual | 2018/08/04 13:10 | Schlageter, Justin v Ornago, Fabrizio | 4-6,6-7 |
| ITF Croatia F2 | 2018/03/10 09:00 | Kajin, Karlo v Schlageter, Justin | 3-6,6-2,6-4 |
| ITF Germany F14 | 2017/10/11 13:10 | Schlageter, Justin v Marc-Andrea Huesler | 1-6,1-6 |
| ITF Germany F3 | 2017/01/22 11:30 | Schlageter, Justin v Recek, Dominik | 4-6,1-6 |
| ITF Germany F17 | 2016/11/03 10:00 | Schlageter, Justin v Hubert Hurkacz | 4-6,0-6 |
| ITF Germany F17 | 2016/11/02 10:00 | Schlageter, Justin v Mayer, Patrick | 6-4,5-7,7-5 |
| ITF Germany F15 | 2015/10/05 10:00 | Schlageter, Justin v Brinkmann, Nils | 3-6,1-6 |
| ITF Germany F15 | 2015/10/04 10:00 | Schlageter, Justin v Schmidt, Gabriel | 6-3,4-6,6-4 |
| ITF Tunisia F32 | 2018/09/19 10:10 | Benitez Chavarriaga, Juan Manuel v Seraphim, Christian | 7-5,6-2 |
| ITF Tunisia F31 | 2018/09/11 11:00 | Gil, Fred v Seraphim, Christian | 7-6,2-6,6-3 |
| ITF Tunisia F31 | 2018/09/10 09:00 | Seraphim, Christian v Leonardo Taddia | 6-3,6-4 |
| ITF Tunisia F31 | 2018/09/08 08:30 | Seraphim, Christian v Dahiya, Paras | 6-3,6-2 |
| ITF Tunisia F30 | 2018/09/06 10:55 | Seraphim, Christian v Johnson, Luke | 6-7,2-6 |
| ITF Tunisia F30 | 2018/09/04 09:00 | Seraphim, Christian v Munafo, Pedro | 6-1,6-2 |
| ITF Tunisia F30 | 2018/09/03 11:30 | Seraphim, Christian v Stefan Palosi | 6-2,6-4 |
| ITF Tunisia F30 | 2018/09/02 14:00 | Seraphim, Christian v Kuzey Cekirge | 6-2,6-3 |