| German Championship | 2021/12/09 10:00 | Michael Weindl v Kai Wehnelt | 3-6,1-6 |
| German Championship | 2021/12/08 11:00 | Niklas Guttau v Michael Weindl | 4-6,6-3,1-6 |
| ITF M15 Heraklion | 2021/11/11 10:30 | Michael Weindl v Peter Fajta | 6-3,6-7,6-7 |
| ITF M15 Heraklion | 2021/11/10 08:30 | Simon A Ivanov v Michael Weindl | 7-5,1-6,1-6 |
| ITF M15 Heraklion | 2021/11/01 09:00 | Michael Weindl v Ioannis Papounidis | 3-6,6-2,3-10 |
| Challenger Ismaning | 2021/10/24 10:35 | Matthias Bachinger v Michael Weindl | 6-1,6-3 |
| ITF M15 Allershausen | 2021/09/01 09:00 | Dominik Boehler v Michael Weindl | 1-6,6-1,6-2 |
| ITF M15 Allershausen | 2021/08/31 08:00 | Anirudh Chandrasekar v Michael Weindl | 2-6,3-6 |
| ITF M15 Ostrava | 2021/11/25 11:00 | Mark Havlicek v Adam Pavlasek | 2-6,2-6 |
| ITF M15 Ostrava | 2021/11/24 11:00 | Ondrej Krstev v Mark Havlicek | 5-7,7-5,3-6 |
| ITF M15 Ostrava | 2021/11/22 09:00 | Lukas Pokorny v Mark Havlicek | 6-4,6-3 |
| ITF M15 Ostrava | 2021/11/21 09:00 | Vojtech Vlkovsky v Mark Havlicek | 4-6,6-7 |
| ITF M15 Opava | 2021/11/14 12:30 | Mark Havlicek v Ondrej Valek | 7-6,6-7,5-10 |
| ITF M15 Antalya | 2021/10/25 07:00 | Mark Havlicek v Aliaksandr Bulitski | 3-6,2-6 |
| ITF M15 Antalya | 2021/10/24 07:00 | Mert Ramadan v Mark Havlicek | 5-7,5-7 |
| ITF M15 Antalya | 2021/10/17 07:00 | Dominik Recek v Mark Havlicek | 6-2,6-3 |