| WTT - Contender Lagos - Kwal. | 2023/06/12 11:10 | Junsung Oh v Orok Etim | W | 3-1 |
| ITTF WK | 2023/05/22 17:40 | Dimitrij Ovtcharov v Niagol Stoyanov | L | 4-1 |
| ITTF WK | 2023/05/21 09:45 | Jeremy Dey v Niagol Stoyanov | W | 0-4 |
| WTT - Star Contender Bangkok - Kwal. | 2023/04/24 05:00 | Daeseong Cho v Niagol Stoyanov | L | 3-1 |
| WTT - Star Contender Bangkok - Kwal. | 2023/04/23 05:50 | Zhe Yu Clarence Chew v Niagol Stoyanov | W | 2-3 |
| WTT Singapore Smash Quals | 2023/03/07 03:00 | Benedek Olah v Niagol Stoyanov | L | 3-2 |
| WTT Feeder Dusseldorf | 2023/02/16 12:45 | Deni Kozul v Niagol Stoyanov | L | 3-0 |
| WTT Feeder Dusseldorf | 2023/02/15 16:50 | Niagol Stoyanov v Chun Ting Wong | W | 3-1 |
| WTT Feeder Dusseldorf | 2023/02/15 13:05 | Niagol Stoyanov v Maciej Kubik | W | 3-2 |