| Challenger - Ochsenhausen | 2018/12/03 09:30 | Niagol Stoyanov v Harmeet Desai | L | 2-3 |
| Qatar Open - Kvinder | 2018/11/08 15:20 | Zhendong Fan v Niagol Stoyanov | L | 4-1 |
| Qatar Open - Kvinder | 2018/09/20 17:50 | Lei Kou v Niagol Stoyanov | L | 4-0 |
| Qatar Open - Mixdouble | 2018/09/19 13:05 | Niagol Stoyanov v Marek Badowski | L | 3-4 |
| Qatar Open - Mixdouble | 2018/08/15 07:10 | Niagol Stoyanov v Yuki Matsuyama | W | 4-1 |
| Qatar Open - Mixdouble | 2018/05/29 02:50 | Niagol Stoyanov v Bo Fang | L | 2-4 |
| Qatar Open - Mixdouble | 2018/05/23 02:40 | Niagol Stoyanov v Jike Zhang | L | 2-4 |
| Qatar Open - Mixdouble | 2018/03/15 11:50 | Sangsu Lee v Niagol Stoyanov | L | 4-2 |
| Challenger - Ochsenhausen | 2018/12/03 08:50 | Josip Huzjak v Lehel Demeter | W | 0-3 |
| Challenger - Ochsenhausen | 2018/11/13 13:40 | Lehel Demeter v Miroslav Horejsi | W | 3-2 |
| Challenger - Ochsenhausen | 2018/11/13 12:15 | Jiri Vrablik v Lehel Demeter | W | 1-3 |
| Challenger - Ochsenhausen | 2018/11/13 11:20 | Josip Huzjak v Lehel Demeter | L | 3-1 |
| Challenger - Ochsenhausen | 2018/11/13 08:40 | Nikola Marinkovic v Lehel Demeter | L | 3-2 |
| Challenger - Ochsenhausen | 2018/11/12 20:20 | Lehel Demeter v Romain Lorentz | W | 3-2 |
| Challenger - Ochsenhausen | 2018/11/12 15:00 | Miroslav Horejsi v Lehel Demeter | W | 1-3 |
| Challenger - Ochsenhausen | 2018/11/12 11:30 | Jiri Vrablik v Lehel Demeter | L | 3-2 |