Estadio: Center Court 1 Grosshesselohe Round: 1
| DTB German Pro Series | 2020/06/13 15:30 | Cedrik-Marcel Stebe v Adrian Oetzbach | 6-1,7-6 |
| ITF M15 Austin | 2019/11/20 17:55 | Adrian Oetzbach v Ruan Roelofse | 0-6,3-6 |
| ITF M15 Austin | 2019/11/19 16:00 | Adrian Oetzbach v Leighton Allen | 6-4,2-6,5-10 |
| ITF M15 Austin | 2019/11/18 16:00 | Adrian Oetzbach v Julian Noah Steinhausen | 6-0,6-3 |
| ITF M25 Malibú | 2019/11/06 01:05 | Evan Song v Adrian Oetzbach | 6-7,6-3,6-4 |
| ITF M25 Houston | 2019/09/19 01:05 | Adrian Oetzbach v Alex Rybakov | 2-6,2-6 |
| ITF M15 Trier | 2019/08/14 10:00 | Fabrizio Ornago v Adrian Oetzbach | 6-0,6-2 |
| ITF M15 Trier | 2019/08/13 12:20 | Adrian Oetzbach v Nicolas Uryson | 6-3,6-2 |
| DTB German Pro Series | 2020/06/13 11:55 | Niklas Guttau v Lucas Gerch | 4-6,3-6 |
| DTB German Pro Series | 2020/06/12 10:10 | Daniel Altmaier v Niklas Guttau | 6-3,4-6,6-3 |
| DTB German Pro Series | 2020/06/11 16:25 | Maximilian Marterer v Niklas Guttau | 6-1,6-3 |
| ITF M15 Monastir | 2020/03/10 08:30 | Vladimir Korolev v Niklas Guttau | 6-2,6-1 |
| ITF M15 Oberhaching | 2020/02/16 15:00 | Niklas Guttau v Emilien Voisin | 6-4,6-7,6-10 |
| ITF M15 Oberhaching | 2020/02/16 10:30 | Niklas Guttau v Joel Kuster | 6-4,7-6 |
| 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 |