| Challenger Series TT | 07/08 07:30 | - | Marius Henninger v Viacheslav Diachenko | L | 3-1 | |
| Challenger Series TT | 07/07 17:30 | - | Viacheslav Diachenko v Dynamo Krasnodar Youth | L | 0-3 | |
| Challenger Series TT | 07/07 16:00 | - | Viktor Yefimov v Viacheslav Diachenko | L | 3-0 | |
| Challenger Series TT | 07/07 14:00 | - | Luis Kraus v Viacheslav Diachenko | L | 3-0 | |
| Challenger Series TT | 07/07 12:00 | - | Viacheslav Diachenko v Felix Muller | W | 3-0 | |
| Challenger Series TT | 07/07 09:30 | - | Viacheslav Diachenko v Oleksii Dehtiarov | L | 1-3 | |
| Challenger Series TT | 07/07 08:00 | - | Viacheslav Diachenko v Florian Bluhm | L | 0-3 | |
| Challenger Series TT | 06/10 19:30 | - | Viacheslav Diachenko v Mykhailo Mosiuk | L | 1-3 | |
| Challenger Series TT | 06/10 18:30 | - | Viacheslav Diachenko v Florian Saljani | W | 3-1 | |
| Challenger Series TT | 06/10 17:30 | - | Viacheslav Diachenko v Sven Wendegatz | W | 3-0 | |
| Challenger Series TT | 06/10 16:30 | - | Serhii Kaminskyi v Viacheslav Diachenko | W | 0-3 | |
| Challenger Series TT | 06/10 15:00 | - | Alexander Krebs v Viacheslav Diachenko | L | 3-0 | |
| Challenger Series TT | 06/10 13:00 | - | Miguel Nunez Tapia v Viacheslav Diachenko | L | 3-0 | |
| Challenger Series TT | 06/10 10:00 | - | Alberto Lillo v Viacheslav Diachenko | L | 3-0 | |
| Challenger Series TT | 06/03 16:00 | - | Viacheslav Diachenko v Sven Wendegatz | W | 3-1 | |
| Challenger Series TT | 06/03 14:30 | - | Viacheslav Diachenko v Siddharta Almeida | W | 3-0 | |
| Challenger Series TT | 06/03 13:00 | - | Viacheslav Diachenko v Oleksii Degtiariov | W | 3-2 | |
| Challenger Series TT | 06/03 11:00 | - | Viacheslav Diachenko v Mykhailo Mosiuk | L | 0-3 | |
| Challenger Series TT | 06/03 09:00 | - | Zengyi Wang v Viacheslav Diachenko | L | 3-1 | |
| Challenger Series TT | 06/03 08:00 | - | Szilard Kanabe v Viacheslav Diachenko | L | 3-2 | |
| Ukraine Win Cup | 05/31 17:30 | - | Viacheslav Diachenko v Vladimir Burylov | L | 2-3 | |
| Ukraine Win Cup | 05/31 17:00 | - | Denis Vakulenko v Viacheslav Diachenko | W | 2-3 | |
| Ukraine Win Cup | 05/31 16:00 | - | Viacheslav Diachenko v Levko Kuzyo | L | 1-3 | |
| Ukraine Win Cup | 05/31 14:30 | - | Sergey Zemyantsev v Viacheslav Diachenko | W | 1-3 | |
| Ukraine Win Cup | 05/31 14:00 | - | Viacheslav Diachenko v Sivin Manjaly | L | 1-3 | |
| Ukraine Win Cup | 05/31 12:30 | - | Artem Khimenko v Viacheslav Diachenko | W | 2-3 | |
| Ukraine Win Cup | 05/31 12:00 | - | Konstantyn Kirsanov v Viacheslav Diachenko | W | 1-3 | |
| Ukraine Win Cup | 05/28 18:15 | - | Dmitriy Aseev v Viacheslav Diachenko | W | 1-3 | |
| Ukraine Win Cup | 05/28 16:45 | - | Oleksandr Ivashkin v Viacheslav Diachenko | W | 2-3 | |
| Ukraine Win Cup | 05/28 16:15 | - | Gleb Zotov v Viacheslav Diachenko | W | 1-3 |