Stadium: Court 5 Oberhaching Round: 44 Ground: Hardcourt indoor
| ITF M15 Heraklion | 2019/11/24 08:00 | Niklas Guttau v Athanassios Manekas | 5-7,2-6 |
| ITF M15 Sharm El Sheikh | 2019/11/20 10:35 | Lucas Hellfritsch v Niklas Guttau | 6-4,6-3 |
| ITF M15 Sharm El Sheikh | 2019/11/14 09:20 | Giorgio Ricca v Niklas Guttau | 6-2,4-6,7-6 |
| ITF M15 Sharm El Sheikh | 2019/11/13 11:40 | Mariano Alberto Hasenkopf v Niklas Guttau | 3-6,5-7 |
| ITF M15 Sharm El Sheikh | 2019/11/06 12:35 | Niklas Guttau v Sidane Pontjodikromo | 3-6,2-6 |
| Challenger Eckental | 2019/10/29 11:40 | Maxime Cressy v Niklas Guttau | 6-3,7-5 |
| Challenger Hamburg | 2019/10/22 09:40 | Jelle Sels v Niklas Guttau | 7-6,6-2 |
| ITF M15 Tabarka | 2019/10/09 09:55 | Niklas Guttau v Alexander Weis | 6-7,2-6 |
| ITF M25 Schlieren | 2019/08/21 13:00 | Joel Kuster v Mirko Martinez | 2-6,4-6 |
| ITF M25 Schlieren | 2019/08/19 13:00 | Joel Kuster v Thomas Setodji | 6-7,6-3,10-8 |
| ITF M25 Schlieren | 2019/08/19 08:00 | Alessandro Coppini v Joel Kuster | 4-6,6-4,6-10 |