| Challenger Mauthausen | 2025/04/28 08:00 | Tadeas Paroulek v Martin Krumich | 6-3,7-5 |
| Challenger Mauthausen | 2025/04/27 09:25 | Syl Gaxherri v Martin Krumich | 0-6,2-6 |
| ITF M25 Antalya | 2025/04/05 07:30 | Sergey Fomin v Martin Krumich | 6-3,6-7,7-5 |
| ITF M25 Antalya | 2025/04/04 07:30 | Moise Kouame v Martin Krumich | 4-6,5-7 |
| ITF M25 Antalya | 2025/04/03 07:00 | Martin Krumich v Jack Loge | 6-3,5-2 |
| ITF M25 Antalya | 2025/04/02 10:41 | Martin Krumich v Emilien Demanet | 6-4,6-2 |
| ITF M15 Antalya | 2025/03/26 07:00 | Martin Krumich v Jack Loge | 7-5,6-4 |
| ITF M15 Antalya | 2025/03/19 13:10 | Luca Preda v Martin Krumich | 0-6,5-7 |
| German Championship | 2021/12/08 11:00 | Niklas Guttau v Michael Weindl | 4-6,6-3,1-6 |
| ITF M15 Oldenzaal | 2021/08/18 16:50 | Niklas Guttau v Niels Lootsma | 3-6,2-6 |
| ITF M15 Oldenzaal | 2021/08/17 07:30 | Nicolas Bruna v Niklas Guttau | 6-3,3-6,6-10 |
| ITF M15 Oldenzaal | 2021/08/16 10:00 | Jordi Garcia Mestre v Niklas Guttau | 4-6,1-6 |
| ITF M15 Oldenzaal | 2021/08/15 08:30 | Egill Sigurdsson v Niklas Guttau | 1-6,4-6 |
| ATP Hamburg | 2021/07/10 09:00 | Carlos Taberner v Niklas Guttau | 6-1,6-2 |
| ITF M15 Antalya | 2021/04/11 07:00 | Edoardo Graziani v Niklas Guttau | 6-4,6-1 |
| ITF M15 Antalya | 2021/04/06 07:00 | Niklas Guttau v Edoardo Graziani | 2-6,3-6 |