| Challenger Ochsenhausen | 2018/12/03 09:30 | Niagol Stoyanov v Harmeet Desai | L | 2-3 |
| Qatar Open 2019, MS | 2018/11/08 15:20 | Zhendong Fan v Niagol Stoyanov | L | 4-1 |
| Qatar Open 2019, MS | 2018/09/20 17:50 | Kou, Lei v Niagol Stoyanov | L | 4-0 |
| Qatar Open XD | 2018/09/19 13:05 | Niagol Stoyanov v Marek Badowski | L | 3-4 |
| Qatar Open XD | 2018/08/15 07:10 | Niagol Stoyanov v Matsuyama, Yuki | W | 4-1 |
| Qatar Open XD | 2018/05/29 02:50 | Niagol Stoyanov v Fang, BO | L | 2-4 |
| Qatar Open XD | 2018/05/23 02:40 | Niagol Stoyanov v Zhang, Jike | L | 2-4 |
| Qatar Open XD | 2018/03/15 11:50 | Sangsu Lee v Niagol Stoyanov | L | 4-2 |
| Challenger Ochsenhausen | 2018/12/03 08:50 | Josip Huzjak v Demeter, Lehel | W | 0-3 |
| Challenger Ochsenhausen | 2018/11/13 13:40 | Demeter, Lehel v Miroslav Horejsi | W | 3-2 |
| Challenger Ochsenhausen | 2018/11/13 12:15 | Jiri Vrablik v Demeter, Lehel | W | 1-3 |
| Challenger Ochsenhausen | 2018/11/13 11:20 | Josip Huzjak v Demeter, Lehel | L | 3-1 |
| Challenger Ochsenhausen | 2018/11/13 08:40 | Marinkovic, Nikola v Demeter, Lehel | L | 3-2 |
| Challenger Ochsenhausen | 2018/11/12 20:20 | Demeter, Lehel v Lorentz, Romain | W | 3-2 |
| Challenger Ochsenhausen | 2018/11/12 15:00 | Miroslav Horejsi v Demeter, Lehel | W | 1-3 |
| Challenger Ochsenhausen | 2018/11/12 11:30 | Jiri Vrablik v Demeter, Lehel | L | 3-2 |