Stadium: Court 5 Round: 25 Ground: Hardcourt indoor
| ITF - Ueberlingen M15 | 2023/08/15 15:25 | David Fix v Justin Schlageter | 7-5,6-3 |
| ITF - Norman M15 | 2022/10/26 17:00 | Justin Schlageter v Tyler Zink | 7-6,3-6,4-6 |
| ITF M15 Bad Salzdetfurth | 2019/10/07 12:55 | Justin Schlageter v Lasse Muscheites | 4-6,5-7 |
| ITF Germany F14 | 2018/10/03 14:20 | Justin Schlageter v Christian Seraphim | 1-6,6-7 |
| Challenger Pullach Qual | 2018/08/04 13:10 | Justin Schlageter v Fabrizio Ornago | 4-6,6-7 |
| ITF Croatia F2 | 2018/03/10 09:00 | Karlo Kajin v Justin Schlageter | 3-6,6-2,6-4 |
| ITF Germany F14 | 2017/10/11 13:10 | Justin Schlageter v Marc-Andrea Huesler | 1-6,1-6 |
| ITF Germany F3 | 2017/01/22 11:30 | Justin Schlageter v Dominik Recek | 4-6,1-6 |
| ITF - Ithaca M15 | 2023/10/06 15:00 | Alex Rybakov v Fons Van Sambeek | 6-4,6-3 |
| ITF - Ithaca M15 | 2023/10/05 14:00 | Fons Van Sambeek v Danil Panarin | 7-6,1-6,6-3 |
| ITF - Ithaca M15 | 2023/10/03 16:30 | Felipe Pinzon Moreno v Fons Van Sambeek | 0-6,4-6 |
| ITF - Albuquerque M15 | 2023/09/28 19:45 | Olle Wallin v Fons Van Sambeek | 6-3,6-3 |
| ITF - Albuquerque M15 | 2023/09/27 21:30 | Andrew Fenty v Fons Van Sambeek | 3-6,4-6 |
| Challenger Cary | 2023/08/07 16:00 | Karl Poling v Fons Van Sambeek | 6-2,6-4 |
| Challenger Cary | 2023/08/06 14:00 | Fons Van Sambeek v Tatsuma Ito | 7-6,1-6,6-3 |
| ITF - Eindhoven M15 | 2023/08/01 14:40 | Stian Klaassen v Fons Van Sambeek | 7-6,6-3 |