Stadium: Court 6 Round: 26 Ground: Clay
| ITF Netherlands F6 | 2018/08/29 14:50 | Zachary Eisinga v Colin Van Beem | 4-6,3-6 |
| ITF Netherlands F6 | 2018/08/27 10:00 | Oscar Moraing v Zachary Eisinga | 6-7,1-6 |
| ITF Netherlands F6 | 2018/08/26 08:00 | Zachary Eisinga v Sebastiano M Zorzi | 6-1,6-3 |
| ITF Netherlands F5 | 2018/08/18 08:00 | Thorsten Sollie v Zachary Eisinga | 4-6,6-4,4-6 |
| ITF Netherlands F4 | 2018/08/12 07:30 | Tim Van Terheijden v Zachary Eisinga | 6-2,6-0 |
| ITF Netherlands F4 | 2018/08/11 09:00 | Jesse Paul Krattiger v Zachary Eisinga | 4-6,3-6 |
| ITF Belgium F6 | 2018/08/01 13:00 | Zachary Eisinga v Alexis Klegou | 2-6,5-7 |
| ITF Belgium F6 Qual | 2018/07/30 08:00 | Raphael Lambling v Zachary Eisinga | 6-4,2-6,1-6 |
| ITF M15 Doha | 2019/03/13 12:00 | Jesper De Jong v Guy Den Heijer | 7-5,6-4 |
| ITF M15 Doha | 2019/03/12 13:30 | Michal Konecny v Guy Den Heijer | 6-4,6-7,3-6 |
| ITF M15 Doha | 2019/03/11 13:55 | Alexandru Vasile Manole v Guy Den Heijer | 2-6,1-6 |
| ITF M15 Doha | 2019/03/11 09:45 | Brian Bencic v Guy Den Heijer | 4-6,1-6 |
| ITF M15 Doha | 2019/03/07 12:00 | Guy Den Heijer v Ricardo Rodriguez-Pace | 4-6,3-6 |
| ITF M15 Doha | 2019/03/06 13:30 | Jabor Mohammed Ali Mutawa v Guy Den Heijer | 1-6,3-6 |
| ITF M15 Doha | 2019/03/05 12:00 | Michiel de Krom v Guy Den Heijer | 5-7,6-3,9-11 |
| ITF M15 Doha | 2019/03/04 13:50 | Yanik Kaelin v Guy Den Heijer | 3-6,4-6 |