Stadium: Centre Court Versmold Round: 1
| 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 | Lenz, Julian 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 |
| ITF - M15 Doha | 2020/03/11 16:20 | Kai Wehnelt v Ryan Nijboer | 2-6,6-4,6-4 |
| ITF - M15 Héraklion | 2020/02/29 09:00 | Kai Wehnelt v Jordan Correia Passos Do Carmo | 6-7,3-6 |
| DTB German Pro Series | 2020/06/23 08:00 | Marvin Moeller v Seifert, Stefan | 4-6,6-3,7-5 |
| ITF - M15 Oberhaching | 2020/02/20 11:00 | Jakub Paul v Seifert, Stefan | 6-4,6-7,6-4 |
| ITF - M15 Héraklion | 2020/02/13 08:30 | Antonio Massara v Seifert, Stefan | 6-3,7-5 |
| ITF - M15 Héraklion | 2020/02/11 09:30 | Stamoulos, Ioannis v Seifert, Stefan | 0-6,6-2,3-6 |
| ITF - M15 Veigy-Foncenex | 2020/01/30 11:45 | Robert, Quentin v Seifert, Stefan | 7-6,4-6,6-3 |
| ITF - M15 Veigy-Foncenex | 2020/01/29 14:40 | Seifert, Stefan v Briand, Jurgen | 7-6,6-1 |
| ITF - M15 Veigy-Foncenex | 2020/01/27 09:00 | Seifert, Stefan v Smits, Glenn | 6-4,6-1 |
| ITF - M25 Nussloch | 2020/01/24 14:30 | Seifert, Stefan v Jonas Forejtek | 6-1,6-7,3-6 |