stadio: Center Court Mulheim Round: 1
| DTB German Pro Series | 2020/06/25 08:00 | Kai Wehnelt v Stefan Seifert | 6-4,6-2 |
| DTB German Pro Series | 2020/06/26 08:00 | Marvin Moeller v Kai Wehnelt | 6-4,6-0 |
| DTB German Pro Series | 2020/06/25 08:00 | Kai Wehnelt v Stefan Seifert | 6-4,6-2 |
| DTB German Pro Series | 2020/06/24 10:30 | Tom Schonenberg v Kai Wehnelt | 7-6,6-3 |
| DTB German Pro Series | 2020/06/12 11:05 | Peter Heller v Kai Wehnelt | 6-4,6-4 |
| DTB German Pro Series | 2020/06/11 09:45 | Max Wiskandt v Kai Wehnelt | 6-4,3-6,1-6 |
| DTB German Pro Series | 2020/06/10 13:50 | Oscar Otte v Kai Wehnelt | 6-2,6-1 |
| DTB German Pro Series | 2020/06/09 09:25 | Julian Lenz v Kai Wehnelt | 7-6,3-6,4-6 |
| ITF M15 Doha | 2020/03/12 12:00 | Kai Wehnelt v Dan Alexandru Tomescu | 4-6,6-3,6-4 |
| 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 |
| ITF M15 Veigy-Foncenex | 2020/01/29 14:40 | Stefan Seifert v Jurgen Briand | 7-6,6-1 |