| Challenger Series TT | 12/13 08:30 | - | Tobias Saltzer v William Koehl | L | 3-1 | |
| Challenger Series TT | 12/12 18:30 | - | William Koehl v Boris Brnovic | W | 3-0 | |
| Challenger Series TT | 12/12 17:00 | - | Mike Hollo v William Koehl | W | 2-3 | |
| Challenger Series TT | 12/12 15:00 | - | Damian Zech v William Koehl | L | 3-1 | |
| Challenger Series TT | 12/12 13:00 | - | William Koehl v Francesco Maragioglio | W | 3-0 | |
| Challenger Series TT | 12/12 10:30 | - | William Koehl v Humberto Manhani | L | 0-3 | |
| Challenger Series TT | 12/12 09:00 | - | William Koehl v Jeromy Loffler | L | 1-3 | |
| Challenger Series TT | 11/26 09:30 | - | Tom Colvin v William Koehl | W | 0-3 | |
| Challenger Series TT | 11/25 18:00 | - | Liang Qiu v William Koehl | L | 3-1 | |
| Challenger Series TT | 11/25 16:30 | - | William Koehl v Marco Stefanidis | W | 3-2 | |
| Challenger Series TT | 11/25 14:00 | - | William Koehl v Florian Bluhm | L | 0-3 | |
| Challenger Series TT | 11/25 12:30 | - | Dauud Cheaib v William Koehl | L | 3-0 |