| German Championship | 2020/12/07 15:30 | Stefan Seifert v David Eisenzapf | 6-1,6-4 |
| DTB German Pro Series | 2020/06/26 09:30 | Tom Schonenberg v Stefan Seifert | 6-4,6-2 |
| DTB German Pro Series | 2020/06/25 08:00 | Kai Wehnelt v Stefan Seifert | 6-4,6-2 |
| DTB German Pro Series | 2020/06/23 08:00 | Marvin Moeller v Stefan Seifert | 4-6,6-3,7-5 |
| ITF M15 Oberhaching | 2020/02/20 11:00 | Jakub Paul v Stefan Seifert | 6-4,6-7,6-4 |
| ITF M15 Heraklion | 2020/02/13 08:30 | Antonio Massara v Stefan Seifert | 6-3,7-5 |
| ITF M15 Heraklion | 2020/02/11 09:30 | Ioannis Stamoulos v Stefan Seifert | 0-6,6-2,3-6 |
| ITF M15 Veigy-Foncenex | 2020/01/30 11:45 | Quentin Robert v Stefan Seifert | 7-6,4-6,6-3 |
| German Championship | 2020/12/08 16:40 | Max Hans Rehberg v Jordi Walder | 6-7,4-5 |
| ITF M15 Trier | 2019/08/14 11:30 | Jordi Walder v Adrian Obert | 4-6,5-7 |
| ITF M15 Trier | 2019/08/13 11:05 | Kai Lemstra v Jordi Walder | 4-6,2-6 |
| ITF M15 Marburg | 2019/07/08 08:00 | Tim Heger v Jordi Walder | 3-6,7-5,10-7 |
| ITF M15 Kamen | 2019/06/26 09:00 | Sebastian Prechtel v Jordi Walder | 6-4,3-6,6-3 |
| ITF M15 Kamen | 2019/06/24 12:30 | Ewan Moore v Jordi Walder | 6-4,3-6,6-10 |
| ITF M15 Kamen | 2019/06/24 08:00 | Daniel Litvinov v Jordi Walder | 1-6,2-6 |
| ITF M15 Kaltenkirchen | 2019/06/10 08:00 | Paul Woerner v Jordi Walder | 6-3,6-3 |