| Challenger Ochsenhausen | 2018/06/18 14:00 | Karakasevic, Aleksandar v Sitak, Andriy | L | 3-0 |
| Challenger Ochsenhausen | 2018/06/18 10:30 | Adam Szudi v Sitak, Andriy | W | 0-3 |
| Challenger Ochsenhausen | 2018/06/18 07:50 | Yannick Vostes v Sitak, Andriy | L | 3-2 |
| Challenger Ochsenhausen | 2018/06/12 10:20 | Sitak, Andriy v Tomas Konecny | L | 1-3 |
| Challenger Ochsenhausen | 2018/06/12 07:00 | Sitak, Andriy v Bohumil Vozicky | L | 1-3 |
| Challenger Ochsenhausen | 2018/06/11 18:00 | Sitak, Andriy v Santos, Emil | L | 0-3 |
| Challenger Ochsenhausen | 2018/06/11 15:20 | Vila, Isaac v Sitak, Andriy | W | 0-3 |
| Challenger Ochsenhausen | 2018/06/11 11:50 | Jiri Vrablik v Sitak, Andriy | L | 3-0 |
| Challenger Ochsenhausen | 2018/06/18 12:30 | Jiri Martinko v David Reitspies | W | 1-3 |
| Challenger Ochsenhausen | 2018/06/18 11:10 | Karakasevic, Aleksandar v David Reitspies | L | 3-0 |
| Challenger Ochsenhausen | 2018/06/18 06:30 | Josip Huzjak v David Reitspies | L | 3-1 |
| Qatar Open XD | 2018/04/03 14:00 | Pfeffer, Simon v David Reitspies | L | 4-3 |
| Qatar Open XD | 2018/03/14 11:00 | Sidorenko, Vladimir v David Reitspies | L | 4-2 |
| Qatar Open XD | 2018/03/13 11:00 | David Reitspies v Wachowiak, Lukasz | W | 4-1 |
| Qatar Open XD | 2018/02/25 16:31 | Kenta Matsudaira v David Reitspies | L | 3-1 |
| Challenger Ochsenhausen | 2017/11/28 13:35 | David Reitspies v Vyborny, Richard | L | 1-3 |