| Austrian Open | 2021/05/29 08:50 | Panji Ahmad Maulana v Justin Hoh | L | 2-1 |
| Austrian Open - Kwal. | 2021/05/28 07:30 | Adi Pratama v Justin Hoh | W | 1-2 |
| Austrian Open - Kwal. | 2021/05/27 15:10 | Yonathan Levit v Justin Hoh | W | 0-2 |
| Austrian Open - Kwal. | 2021/05/27 10:00 | Jonathan Matias v Justin Hoh | W | 0-2 |
| Slovenia Int. | 2021/05/20 13:20 | Viktor Ording Kauffman v Justin Hoh | L | 2-0 |
| Slovenia Int. | 2021/05/20 10:00 | Luka Ban v Justin Hoh | W | 0-2 |
| Slovenia Int. - Kwal. | 2021/05/19 14:40 | Senne Houthoofd v Justin Hoh | W | 0-2 |
| Slovenia Int. - Kwal. | 2021/05/19 11:40 | Gregor Alic v Justin Hoh | W | 0-2 |
| Luxembourg Open - Kwal. | 2022/05/05 08:20 | Martin Ouazzen v Justin Seibel | L | 2-0 |
| Italian International - Kwal. | 2021/12/16 12:04 | Sacha Leveque v Justin Seibel | L | 2-0 |
| Slovenië - Future Series - Kwal. | 2021/11/25 10:10 | Ludvig Petre Olsson v Justin Seibel | L | 2-0 |
| Cyprus Int. Qual | 2021/10/14 12:00 | Justin Seibel v Magnus Bach Kristensen | L | 0-2 |
| Cyprus Int. Qual | 2021/10/14 09:30 | Justin Seibel v Balazs Papai | W | 2-0 |
| Hellas Int. - Kwal. | 2021/09/02 08:00 | Justin Seibel v Marios Michail Boulios | W | 2-0 |