Stadium: Hard 5 Round: 44 Ground: Hardcourt outdoor
| 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 M15 - Tabarka | 2019/10/02 08:30 | Niklas Guttau v Bogdan Bobrov | 0-6,6-3,4-6 |
| ITF - M15 - Monastir | 2019/11/10 08:00 | Athanassios Manekas v Diego F Flores | 6-2,0-6,6-10 |
| ITF - M15 - Monastir | 2019/11/06 08:30 | Luca Giacomini v Athanassios Manekas | 6-1,6-3 |
| ITF - M15 - Monastir | 2019/11/04 12:00 | Miles Jones v Athanassios Manekas | 6-4,3-6,7-10 |
| ITF - M15 - Monastir | 2019/11/04 08:00 | Koonwar Gupta v Athanassios Manekas | 4-6,3-6 |
| ITF - M15 - Monastir | 2019/11/03 08:00 | Marco Corino v Athanassios Manekas | 3-6,6-7 |
| ITF M25 - Monastir | 2019/10/28 11:00 | David Quayle v Athanassios Manekas | 6-3,7-6 |
| ITF M25 - Monastir | 2019/10/27 15:30 | Athanassios Manekas v Oleg Khotkov | 6-3,6-1 |
| ITF M15 - Getafe Madrid | 2019/10/14 09:00 | Alberto Barroso Campos v Athanassios Manekas | 6-3,6-2 |