Stadium: Ustron 2 Round: 25 Ground: Clay
| ITF Turkey F16 | 2018/04/22 07:30 | Linus Frost v Santiago Besada | 7-5,6-2 |
| ITF Turkey F16 | 2018/04/21 07:30 | Ruslan Khunarikov v Santiago Besada | 6-7,5-7 |
| ITF Turkey F15 | 2018/04/14 09:30 | Sam Taylor v Santiago Besada | 6-4,7-6 |
| ITF Turkey F14 | 2018/04/09 07:30 | Orlando Luz v Santiago Besada | 2-6,6-3,6-1 |
| ITF Turkey F14 | 2018/04/08 07:30 | Kittirat Kerdlaphee v Santiago Besada | 0-6,1-6 |
| ITF Turkey F14 | 2018/04/07 07:30 | Ricardo David Mayagoitia v Santiago Besada | 2-6,2-6 |
| ITF Turkey F13 | 2018/04/04 08:40 | Thomas Statzberger v Santiago Besada | 6-2,6-1 |
| ITF Turkey F13 | 2018/04/02 07:00 | Boris Butulija v Santiago Besada | 2-6,7-5,3-6 |
| ITF Poland F1 | 2018/05/04 13:00 | Guy Den Heijer v Michael Vrbensky | 7-6,2-6,3-6 |
| ITF Poland F1 | 2018/05/03 09:00 | Guy Den Heijer v Piotr Grynkowski | 6-1,6-2 |
| ITF Greece F4 | 2018/03/18 09:30 | Guy Den Heijer v Duje Ajdukovic | 3-6,6-3,4-6 |
| ITF Greece F4 | 2018/03/17 07:30 | Guy Den Heijer v Vasilios Caripi | 5-7,6-3,6-4 |
| ITF Greece F3 | 2018/03/15 08:00 | Neil Pauffley v Guy Den Heijer | 6-4,6-2 |
| ITF Greece F3 | 2018/03/13 10:20 | Jannik Sinner v Guy Den Heijer | 3-6,6-7 |
| ITF Greece F2 | 2018/03/03 07:30 | Guy Den Heijer v Duje Ajdukovic | 3-6,5-7 |
| ITF Spain F4 | 2018/02/10 14:30 | Daniel Gimeno-Traver v Guy Den Heijer | 6-2,7-5 |