Stadium: Court 6 Round: 26 Ground: Clay
| ITF M15 Oldenzaal | 2019/08/14 11:00 | Niels Lootsma v Eisinga, Zachary | 7-6,3-6,1-6 |
| ITF M15 Eupen | 2019/08/06 08:00 | Eisinga, Zachary v Hiramatsu, Shinnosuke | 6-4,2-6,9-11 |
| ITF M15 Eupen | 2019/08/05 09:00 | Hellfritsch, Lucas v Eisinga, Zachary | 7-6,6-7,4-10 |
| ITF M15 Alkmaar | 2019/06/27 09:55 | Eisinga, Zachary v Andrea Bolla | 6-7,3-6 |
| ITF M15 Alkmaar | 2019/06/26 09:40 | Eisinga, Zachary v Martinez, Alex | 4-6,6-2,6-4 |
| ITF Netherlands F6 | 2018/08/29 14:50 | Eisinga, Zachary v van Beem, Colin | 4-6,3-6 |
| ITF Netherlands F6 | 2018/08/27 10:00 | Oscar Moraing v Eisinga, Zachary | 6-7,1-6 |
| ITF Netherlands F6 | 2018/08/26 08:00 | Eisinga, Zachary v Zorzi, Sebastiano Mahoro | 6-1,6-3 |
| ITF M15 Oldenzaal | 2019/08/14 17:20 | Rother, Jannik v Guy Den Heijer | 7-5,3-6,4-6 |
| ITF M15 Eupen | 2019/08/07 08:00 | Guy Den Heijer v Daniel De Jonge | 2-6,3-6 |
| Brussels, Singles M-ITF-BEL-03A | 2019/08/04 12:00 | Heyman, Christopher v Guy Den Heijer | 2-6,6-0,6-4 |
| Brussels, Singles M-ITF-BEL-03A | 2019/08/03 11:00 | Guy Den Heijer v Jesper De Jong | 6-4,4-6,6-0 |
| Brussels, Singles M-ITF-BEL-03A | 2019/08/02 13:45 | Michael Geerts v Guy Den Heijer | 3-6,7-5,4-6 |
| Brussels, Singles M-ITF-BEL-03A | 2019/08/01 08:00 | Guy Den Heijer v Hamou, Maxime | 3-6,6-4,6-2 |
| Brussels, Singles M-ITF-BEL-03A | 2019/07/31 12:00 | Guy Den Heijer v Dermiens, Guillaume | 6-3,6-3 |
| Brussels, Singles M-ITF-BEL-03A | 2019/07/29 10:00 | Guy Den Heijer v Kenzlers, Julian | 6-1,6-1 |