| Challenger Series TT | 08/04 08:30 | - | Hannes Hormann v Karl Zimmermann | L | 3-1 | |
| Challenger Series TT | 08/04 07:10 | - | 신케비크, 보단 v Karl Zimmermann | L | 3-1 | |
| Challenger Series TT | 08/03 17:10 | - | Marco Stefanidis v Karl Zimmermann | W | 2-3 | |
| Challenger Series TT | 08/03 15:10 | - | 왕, 쩡이 v Karl Zimmermann | L | 3-1 | |
| Challenger Series TT | 08/03 12:30 | - | Daniel Rinderer v Karl Zimmermann | L | 3-1 | |
| Challenger Series TT | 08/03 11:10 | - | 리모노프, 앤턴 v Karl Zimmermann | L | 3-0 | |
| Challenger Series TT | 08/03 06:30 | - | Damian Zech v Karl Zimmermann | W | 1-3 | |
| Challenger Series TT | 05/30 09:10 | - | 버글런드, 시몬 v Karl Zimmermann | L | 3-0 | |
| Challenger Series TT | 05/30 06:30 | - | 리모노프, 앤턴 v Karl Zimmermann | L | 3-0 | |
| Challenger Series TT | 05/29 17:10 | - | Karl Zimmermann v Ryoichi Yoshiyama | L | 2-3 | |
| Challenger Series TT | 05/29 15:10 | - | Karl Zimmermann v 신케비크, 보단 | - | Cancelled | |
| Challenger Series TT | 05/29 13:10 | - | 흐리바, 피터 v Karl Zimmermann | L | 3-0 | |
| Challenger Series TT | 05/29 10:30 | - | 체아이브, 다우드 v Karl Zimmermann | L | 3-0 | |
| Challenger Series TT | 05/29 07:50 | - | 로시, 카를로 v Karl Zimmermann | L | 3-0 | |
| Challenger Series TT | 03/10 11:30 | - | Karl Zimmermann v 체임버스, 딜런 | L | 1-3 | |
| Challenger Series TT | 03/10 08:50 | - | Karl Zimmermann v Teodoro, Guilherme | L | 1-3 | |
| Challenger Series TT | 03/09 20:10 | - | Karl Zimmermann v Thibault Poret | L | 0-3 | |
| Challenger Series TT | 03/09 15:30 | - | Karl Zimmermann v Damian Zech | W | 3-0 | |
| Challenger Series TT | 03/09 13:30 | - | Karl Zimmermann v Samuel Amann | W | 3-0 | |
| Challenger Series TT | 03/09 10:10 | - | 파데예프, 키릴 v Karl Zimmermann | L | 3-1 | |
| Challenger Series TT | 03/09 08:10 | - | Karl Zimmermann v 레바자크, 디미트리 | L | 0-3 | |
| Challenger Series TT | 01/05 20:10 | - | Karl Zimmermann v Samuel Amann | - | Cancelled | |
| Challenger Series TT | 01/05 15:30 | - | Karl Zimmermann v 파데예프, 키릴 | - | Cancelled | |
| Challenger Series TT | 01/05 13:30 | - | Karl Zimmermann v 헤닝거, 마리우스 | - | Cancelled | |
| Challenger Series TT | 01/05 10:10 | - | Daniel Rinderer v Karl Zimmermann | - | Cancelled | |
| Challenger Series TT | 01/05 08:10 | - | Karl Zimmermann v Salim Karam | - | Cancelled | |
| Challenger Series TT | 12/13 09:30 | - | Kenan Hrnic v Karl Zimmermann | W | 1-3 | |
| Challenger Series TT | 12/13 08:10 | - | 하페크, 스벤 v Karl Zimmermann | W | 1-3 | |
| Challenger Series TT | 12/12 18:10 | - | Nikola Grujic v Karl Zimmermann | W | 1-3 | |
| Challenger Series TT | 12/12 16:10 | - | 헤닝거, 마리우스 v Karl Zimmermann | L | 3-2 |