| Paraguay Open Women | 2019/09/13 15:50 | Adriana Diaz v Iwasa, Agustina | W | 4-0 |
| Czech Open Women | 2019/08/22 12:40 | Liu, Xi v Adriana Diaz | L | 4-0 |
| Pan American Games Women | 2019/08/10 23:00 | Adriana Diaz v Jessica Yamada | W | 3-1 |
| Pan American Games Women | 2019/08/10 22:20 | Adriana Diaz v Bruna Takahashi | L | 1-3 |
| Pan American Games Women | 2019/08/08 22:30 | Brito, Eva v Adriana Diaz | W | 0-3 |
| Pan American Games Women | 2019/08/07 23:00 | Wu, Yue v Adriana Diaz | W | 1-4 |
| Pan America Games Women | 2019/08/07 16:00 | Bruna Takahashi v Adriana Diaz | W | 0-4 |
| Pan America Games Women | 2019/08/06 21:00 | Medina, Paula v Adriana Diaz | W | 0-4 |
| Paraguay Open Women | 2019/09/13 17:20 | Paulina Vega v Melanie Diaz | W | 2-4 |
| Pan American Games Women | 2019/08/10 23:20 | Melanie Diaz v Bruna Takahashi | W | 3-2 |
| Pan American Games Women | 2019/08/08 23:30 | Brito, Eva v Melanie Diaz | W | 1-3 |
| Pan America Games Women | 2019/08/07 15:00 | Melanie Diaz v Wu, Yue | L | 2-4 |
| Pan America Games Women | 2019/08/06 20:00 | Yadira Silva v Melanie Diaz | W | 3-4 |
| Pan America Games Women | 2019/08/06 15:00 | Brito, Eva v Melanie Diaz | W | 0-4 |
| ITTF China Open 2019, WS | 2019/05/29 02:00 | Melanie Diaz v Ho Ching Lee | L | 1-4 |
| République tchèque - Extraleague | 2019/03/20 06:40 | Melanie Diaz v Chung, Rheann | W | 3-0 |