| Portuguese Int. Qual | 05/06 09:30 | 1 | Chang, Joao v 토거센, 매즈 | L | 0-2 | |
| Portuguese Int. | 11/06 11:20 | 7 | 피리스, 카를로스 v Chang, Joao | L | 2-0 | |
| Portuguese Int. Qual | 11/05 12:00 | - | Pedro Campos v Chang, Joao | W | 0-2 | |
| German Open 2019, WD, Qualification | 03/08 10:30 | 1 | Laanes, Mihkel v Chang, Joao | L | 2-0 |