| Hellas International - Qual. | 2021/09/02 06:30 | Stamatis Tsigirdakis v Tonni Zhou | W | 0-2 |
| Latvia Int. Qual | 2021/08/27 07:00 | Tonni Zhou v Jing Hong Kok | L | 0-2 |
| Latvia Int. Qual | 2021/08/26 15:30 | Calle Fredholm v Tonni Zhou | W | 0-2 |
| Latvia Int. Qual | 2021/08/26 09:20 | Tonni Zhou v Andrei Schmidt | W | 2-0 |
| Internazionali di Slovenia - Qual. | 2021/05/19 10:30 | Robin Mesman v Tonni Zhou | L | 2-1 |
| Internazionali di Slovenia - Qual. | 2021/05/19 14:20 | Sacha Leveque v Raynaldi Oktavianur Rizky | L | 0-2 |
| Portuguese Int. Qual | 2021/05/06 09:30 | Sacha Leveque v Nicolas A. Mueller | L | 1-2 |