| Welsh Int Qual | 2021/12/01 11:55 | Misbun Ramdan Mohmed Misbun v Finn Achthoven | W | 0-2 |
| Slovenia Future Series Qual | 2021/11/25 14:25 | Sid Palakkal v Finn Achthoven | L | 2-0 |
| Slovenia Future Series Qual | 2021/11/25 12:30 | Kai Niederhuber v Finn Achthoven | L | 2-0 |
| Polish Int. Qual | 2021/09/23 10:00 | Adi Pratama v Finn Achthoven | L | 2-0 |
| Spain Int Qual | 2021/06/16 15:25 | Elias Bracke v Finn Achthoven | L | 2-0 |
| Spain Int Qual | 2021/06/16 09:40 | Joseph Waugh v Finn Achthoven | W | 0-2 |
| Austrian Open Qual | 2021/05/27 09:50 | Finn Achthoven v Miha Ivanic | L | 1-2 |
| Slovenia Int. | 2021/05/20 11:20 | Finn Achthoven v Alex Lanier | L | 0-2 |
| Welsh Int Qual | 2021/12/01 12:30 | Mikolaj Szymanowski v Johnnie Torjussen | W | 0-2 |
| Czech Open | 2021/10/22 16:20 | Joakim Oldorff v Johnnie Torjussen | L | 2-1 |
| Sudirman Cup | 2021/09/30 13:30 | Johnnie Torjussen v Adham H Elgamal | W | 2-0 |
| Sudirman Cup | 2021/09/28 13:30 | Kento Momota v Johnnie Torjussen | L | 2-0 |
| Sudirman Cup | 2021/09/27 07:30 | Zii Jia Lee v Johnnie Torjussen | L | 2-0 |
| Hellas Int. | 2021/09/04 08:20 | Johnnie Torjussen v Shahyar Shaqeem | L | 0-2 |
| Hellas Int. | 2021/09/03 09:30 | Johnnie Torjussen v Adam Mendrek | W | 2-0 |
| Spain Masters | 2021/05/19 12:00 | Magnus Johannesen v Johnnie Torjussen | L | 2-0 |