Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF Qatar F5 | 2018/12/10 14:00 | Lucas Gerch v Guy Den Heijer | 6-2,3-6,4-6 |
| ITF Qatar F4 | 2018/12/04 16:55 | Zizou Bergs v Guy Den Heijer | 6-4,6-0 |
| ITF Qatar F4 | 2018/12/03 12:00 | Guy Den Heijer v Alexander Donski | 4-6,7-5,6-1 |
| ITF Qatar F4 | 2018/12/02 15:05 | Guy Den Heijer v Yanik Kaelin | 6-2,6-3 |
| ITF Egypt F28 | 2018/11/21 08:00 | Kacper Zuk v Guy Den Heijer | 6-7,6-3,7-5 |
| ITF Egypt F27 | 2018/11/14 09:20 | Jesper De Jong v Guy Den Heijer | 6-3,6-3 |
| ITF Israel F14 | 2018/10/16 12:30 | Claudio Fortuna v Guy Den Heijer | 6-3,6-1 |
| ITF Israel F13 | 2018/10/10 07:00 | Guy Den Heijer v Edan Leshem | 1-6,2-6 |
| Challenger Champaign | 2018/11/16 00:00 | Tak Khunn Wang v Reilly Opelka | 2-6,2-6 |
| Challenger Champaign | 2018/11/14 17:00 | Mikael Ymer v Tak Khunn Wang | 1-6,4-6 |
| Challenger Champaign | 2018/11/13 18:45 | Tak Khunn Wang v JC Aragone | 6-3,6-1 |
| Challenger Eckental | 2018/10/27 11:55 | Gleb Sakharov v Tak Khunn Wang | 6-3,3-6,6-3 |
| Challenger Brest | 2018/10/25 14:30 | Benjamin Bonzi v Tak Khunn Wang | 7-6,6-4 |
| Challenger Brest | 2018/10/24 18:15 | Tak Khunn Wang v Tomislav Brkic | 6-2,7-6 |
| Challenger Brest | 2018/10/22 09:00 | Viktor Galovic v Tak Khunn Wang | 4-6,2-6 |
| Challenger Brest | 2018/10/21 08:30 | Tak Khunn Wang v Zizou Bergs | 2-6,6-3,6-0 |