Estadio: Center Court Round: 14 Ground: Clay
| ITF Egipto F4 | 2018/02/05 09:00 | Johan Nikles v Lucas Gerch | 6-2,6-3 |
| ATP Gstaad | 2021/07/19 10:30 | Johan Nikles v Vit Kopriva | 2-6,1-6 |
| Challenger de Amersfoort | 2021/07/15 18:05 | Johan Nikles v Lukas Rosol | 2-6,1-6 |
| Challenger de Amersfoort | 2021/07/13 10:15 | Ryan Nijboer v Johan Nikles | 6-7,2-6 |
| Challenger de Amersfoort | 2021/07/12 09:00 | Jeremy Jahn v Johan Nikles | 2-6,3-6 |
| Challenger de Amersfoort | 2021/07/11 14:00 | Dominik Palan v Johan Nikles | 4-6,6-7 |
| ITF M25 The Hague | 2021/07/03 08:00 | Javier Barranco Cosano v Johan Nikles | 7-5,6-4 |
| ITF M25 The Hague | 2021/07/02 10:30 | Mateus Alves v Johan Nikles | 2-6,6-7 |
| ITF M25 The Hague | 2021/07/01 10:50 | Johan Nikles v Julian Ocleppo | 6-4,6-1 |
| ITF M25 Frankfurt am Main | 2021/08/14 12:05 | Lucas Gerch v Yshai Oliel | 6-4,3-6,5-7 |
| ITF M25 Frankfurt am Main | 2021/08/13 14:00 | Lucas Gerch v Louis Wessels | 3-6,6-3,6-4 |
| ITF M25 Frankfurt am Main | 2021/08/12 11:15 | Matthew Romios v Lucas Gerch | 6-7,1-6 |
| ITF M25 Frankfurt am Main | 2021/08/11 15:30 | Kai Wehnelt v Lucas Gerch | 6-3,2-6,4-6 |
| ITF M25 Wetzlar | 2021/08/04 09:55 | Daniel Cukierman v Lucas Gerch | 6-3,2-6,6-4 |
| Challenger de Poznan | 2021/07/26 11:35 | David Poljak v Lucas Gerch | 7-5,1-6,6-4 |
| Challenger de Poznan | 2021/07/25 10:30 | Sebastian Fanselow v Lucas Gerch | 2-6,5-7 |
| ITF M25 The Hague | 2021/07/01 09:55 | Manuel Guinard v Lucas Gerch | 6-3,6-2 |