| Thomas Cup | 2021/10/11 17:00 | Viktor Axelsen v Samuel Hsiao | L | 2-0 |
| Poolse Int. | 2021/09/24 12:40 | Samuel Hsiao v Magnus Johannesen | L | 0-2 |
| Austrian Open | 2021/05/28 14:05 | Samuel Hsiao v Alex Lanier | L | 1-2 |
| Slovenia Int. | 2021/05/20 10:20 | Samuel Hsiao v Panji Ahmad Maulana | L | 1-2 |
| Portuguese Int. Qual | 2021/05/06 15:20 | Adi Pratama v Samuel Hsiao | L | 2-0 |
| Portuguese Int. Qual | 2021/05/06 12:30 | Samuel Hsiao v Jonas Schwarz | W | 2-1 |
| Orleans Masters | 2021/03/24 13:25 | Samuel Hsiao v June Wei Cheam | L | 0-2 |
| Orleans Masters - Kwal. | 2021/03/23 13:40 | Enogat Roy v Samuel Hsiao | W | 0-2 |
| Thomas Cup | 2021/10/09 17:00 | Viktor Axelsen v Christo Popov | L | 2-1 |
| Denmark Masters | 2021/08/07 08:20 | Lakshya Sen v Christo Popov | L | 2-1 |
| Denmark Masters | 2021/08/06 11:40 | Mads Christophersen v Christo Popov | W | 1-2 |
| Denmark Masters | 2021/08/06 07:20 | Christo Popov v Rasmus Messerschmidt | W | 2-0 |
| Spain Masters | 2021/05/19 10:15 | Victor Svendsen v Christo Popov | L | 2-0 |
| Orleans Masters | 2021/03/25 16:00 | Christo Popov v Joran Kweekel | L | 1-2 |
| Orleans Masters | 2021/03/24 14:10 | Magnus Johannesen v Christo Popov | W | 1-2 |
| EK teams | 2021/02/20 13:00 | Viktor Axelsen v Christo Popov | L | 2-0 |