| Italian International - Kvalifikation | 2021/12/16 12:05 | Nicolo Volpi v Kian-Yu Oei | W | 0-2 |
| Welsh Int Qual | 2021/12/02 10:20 | Kian-Yu Oei v Varun Kapur | L | 1-2 |
| Welsh Int Qual | 2021/12/01 17:10 | Kian-Yu Oei v Aaron Sonnenschein | W | 2-1 |
| Welsh Int Qual | 2021/12/01 11:20 | Kian-Yu Oei v Ludvig Petre Olsson | W | 2-1 |
| Polish International - Kvalifikation | 2021/09/24 08:00 | Kian-Yu Oei v Giovanni Toti | L | 0-2 |
| Polish International - Kvalifikation | 2021/09/23 15:00 | Szymon Stokfisz v Kian-Yu Oei | W | 0-2 |
| Hellas International - Kvalifikation | 2021/09/02 08:00 | Kian-Yu Oei v Ken Yon Ong | L | 0-2 |
| Italian International - Kvalifikation | 2021/12/16 10:55 | Nicolas A. Mueller v Ragnar Sepp | W | 2-0 |
| Bulgarian International | 2021/10/08 08:55 | Nicolas A. Mueller v Brian Holtschke | L | 0-2 |
| Hellas International | 2021/09/03 10:05 | Nicolas A. Mueller v Shahyar Shaqeem | L | 1-2 |
| Latvia International | 2021/08/28 08:00 | Joonas Korhonen v Nicolas A. Mueller | L | 2-0 |
| Latvia International | 2021/08/27 12:30 | Nicolas A. Mueller v Valentin Singer | W | 2-1 |
| Denmark Masters - Kvalifikation | 2021/08/05 14:00 | Elias Bracke v Nicolas A. Mueller | L | 2-0 |
| Spain International - Kvalifikation | 2021/06/16 11:00 | Nicolas A. Mueller v Jonas Jaeger | L | 0-2 |
| Spain International - Kvalifikation | 2021/06/16 10:40 | Nicolas A. Mueller v Adrian Alvarez | W | 2-0 |