Results
| ITF M25 Poznan | 08/27 12:21 | - | Fryderyk Lechno-Wasiutynski v Niklas Guttau | 6-2,6-3 | |
| ITF M25 Poznan | 08/26 10:22 | - | Niklas Guttau v Oliwier Sterniczuk | 6-2,5-2 | |
| ITF M15 Bastad | 08/20 11:57 | - | Noel Larwig v Niklas Guttau | 7-6,3-6,7-5 | |
| ITF M15 Bastad | 08/19 11:16 | - | Niklas Guttau v Oliver Johansson | 6-3,6-3 | |
| ITF M15 Bastad | 08/18 12:28 | - | Niklas Guttau v Gabriel Jornert | 6-2,6-1 | |
| ITF M25 Satu Mare | 05/30 08:30 | - |
Niklas Guttau v
Alex M Pujolras
|
1-3 | |
| ITF M25 Satu Mare | 05/29 13:00 | - | Martin Krumich v Niklas Guttau | 6-2,4-6,6-7 | |
| ITF M25 Satu Mare | 05/27 07:00 | - | Niklas Guttau v Max Pade | 7-6,6-3 | |
| German Championship | 12/08 11:00 | - | Niklas Guttau v Michael Weindl | 4-6,6-3,1-6 | |
| ITF M15 Oldenzaal | 08/18 16:50 | 25 | Niklas Guttau v Niels Lootsma | 3-6,2-6 | |
| ITF M15 Oldenzaal | 08/17 07:30 | 62 |
Gimnasia Jujuy
v
Niklas Guttau |
6-3,3-6,6-10 | |
| ITF M15 Oldenzaal | 08/16 10:00 | 62 | Jordi Garcia Mestre v Niklas Guttau | 4-6,1-6 |
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