| Belgian Int. Qual | 2019/09/11 07:30 | Schmidt, Oliver v De Decker, Sander | W | 0-2 |
| Lithuanian Int. Qual | 2019/06/06 08:55 | Brady, Mark v De Decker, Sander | L | 2-0 |
| Latvia Int. Qual | 2019/05/30 12:00 | Loo, Marcus v De Decker, Sander | W | 1-2 |
| Hellas Int. Qual | 2019/05/03 06:30 | Dogan, Haktan v De Decker, Sander | L | 2-0 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/04/12 08:05 | Mohamed A Belarbi v De Decker, Sander | L | 2-1 |
| Estonie Int. - | 2020/01/10 09:30 | Tsai, Andy v Shimono, Hashiru | L | 1-2 |
| Estonie Int. - Qualif. | 2020/01/09 14:30 | Alcala, Alejandro v Tsai, Andy | W | 0-2 |
| Estonie Int. - Qualif. | 2020/01/09 12:20 | Tsai, Andy v Arturs Akmens | W | 2-0 |
| Estonie Int. - Qualif. | 2020/01/09 10:30 | Tsai, Andy v Ioannou, Andreas | W | 2-0 |
| Scottish Open Qual | 2019/11/21 14:50 | Kiran George v Tsai, Andy | L | 2-0 |
| Scottish Open Qual | 2019/11/21 11:55 | Tsai, Andy v Dolman, Adam | W | 2-0 |
| Norwegian Int. | 2019/11/09 10:20 | Tsai, Andy v Joran Kweekel | L | 0-2 |
| Norwegian Int. | 2019/11/08 15:30 | Kim Kristensen, D. v Tsai, Andy | W | 1-2 |