| Dutch Int. - Qualif. | 2022/04/13 11:00 | Veenstra, Niels v Condratiuc, Nicolai | W | 2-0 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/09/12 08:00 | Veenstra, Niels v Leung, Toby | W | 2-0 |
| Dutch Open | 2016/10/12 11:55 | Anders Antonsen v Veenstra, Niels | L | 2-0 |
| Giraldilla Int. XD | 2016/09/14 09:19 | King, David v Veenstra, Niels | L | 2-0 |
| Dutch Int. - Qualif. | 2022/04/13 07:00 | van Gysel, Leo v Danny Robson | W | 2-1 |
| Estonie Int. - Qualif. | 2022/01/13 12:20 | van Gysel, Leo v Matthias Kicklitz | L | 0-2 |
| Estonie Int. - Qualif. | 2022/01/13 11:00 | Sacha Leveque v van Gysel, Leo | W | 0-2 |
| Estonie Int. - Qualif. | 2022/01/13 08:20 | Jin Hong Teh v van Gysel, Leo | W | 0-2 |
| Italian Int. Qual | 2021/12/16 16:10 | Christopher Vittoriani v van Gysel, Leo | L | 2-0 |
| Italian Int. Qual | 2021/12/16 10:20 | Yohan Barbieri v van Gysel, Leo | W | 0-2 |
| Slovenia Future Series | 2021/11/26 11:30 | Christopher Vittoriani v van Gysel, Leo | L | 2-0 |
| Slovenia Future Series Qual | 2021/11/25 19:40 | van Gysel, Leo v Cholan Kayan | W | 2-1 |