| Challenger Series TT | 2023/08/15 06:30 | Marcel Neumaier v Makoto Nogami | L | 0-3 |
| Challenger Series TT | 2023/08/14 16:30 | Marcel Neumaier v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/08/14 15:50 | Marcel Neumaier v Carlos Caballero | L | 0-3 |
| Challenger Series TT | 2023/08/14 11:50 | Marcel Neumaier v Samuel Amann | W | 3-0 |
| Challenger Series TT | 2023/08/14 09:10 | Marcel Neumaier v Daniel Rinderer | L | 2-3 |
| Challenger Series TT | 2023/08/14 06:30 | Marcel Neumaier v Jeromy Loffler | L | 2-3 |
| Challenger Series TT | 2023/02/24 11:30 | Marcel Neumaier v Rafael Turrini | L | 0-3 |
| Challenger Series TT | 2023/02/24 08:50 | Marcel Neumaier v Salim Karam | W | 3-1 |
| Challenger Series TT | 2023/08/14 17:10 | Makoto Nogami v Marco Stefanidis | W | 1-3 |
| Challenger Series TT | 2023/08/14 15:10 | Dauud Cheaib v Marco Stefanidis | L | 3-2 |
| Challenger Series TT | 2023/08/14 13:50 | Carlos Caballero v Marco Stefanidis | L | 3-0 |
| Challenger Series TT | 2023/08/14 09:50 | Samuel Amann v Marco Stefanidis | W | 0-3 |
| Challenger Series TT | 2023/08/14 07:10 | Daniel Rinderer v Marco Stefanidis | L | 3-0 |
| Challenger Series TT | 2023/08/04 09:10 | Marco Stefanidis v Bohdan Sinkevych | L | 1-3 |
| Challenger Series TT | 2023/08/03 19:50 | Marco Stefanidis v Anton Limonov | L | 0-3 |
| Challenger Series TT | 2023/08/03 17:10 | Marco Stefanidis v Karl Zimmermann | L | 2-3 |