| WTT - Feeder Havirov | 04/15 11:25 | 6 | Seongil Jang v Niagol Stoyanov | L | 3-1 | |
| WTT Feeder Varazdin | 04/05 17:05 | 4 | Niagol Stoyanov v Kristian Karlsson | L | 1-3 | |
| WTT Feeder Varazdin | 04/05 11:30 | 5 | Niagol Stoyanov v Baldwin Chan | W | 3-1 | |
| WTT Feeder Varazdin | 04/04 09:10 | 6 | Andrej Gacina v Niagol Stoyanov | W | 2-3 | |
| WTT Feeder Beyrouth 2 | 03/23 10:55 | 4 | Chih Yuan Chuang v Niagol Stoyanov | L | 3-0 | |
| WTT Feeder Beyrouth 2 | 03/22 09:25 | 6 | Mazen Sanaoubar v Niagol Stoyanov | W | 0-3 | |
| WTT Feeder Beyrouth 1 | 03/19 16:50 | 5 | Manush Utpalbhai Shah v Niagol Stoyanov | L | 3-2 | |
| Singapore Smash - Qualif. | 03/07 05:40 | 6 | Niagol Stoyanov v Yukiya Uda | L | 0-3 | |
| WTT Feeder Manchester | 02/02 18:35 | 5 | Liam Pitchford v Niagol Stoyanov | L | 3-1 | |
| WTT Star Contender - Goa - Qualif. | 01/24 12:25 | - | Niagol Stoyanov v Daeseong Cho | L | 0-3 | |
| WTT Star Contender - Goa - Qualif. | 01/24 06:15 | - | Niagol Stoyanov v Yashansh Malik | W | 3-1 | |
| WTT Feeder - Corpus Christi | 01/18 01:05 | 3 | Niagol Stoyanov v Manav Vikash Thakkar | L | 1-3 |