Round: 25 Ground: Clay
| ITF Netherlands F1 | 2017/06/22 17:55 | Botic Van De Zandschulp v Guy Den Heijer | 6-3,6-2 |
| ITF Netherlands F1 | 2017/06/20 09:25 | Vincent Van Den Honert v Guy Den Heijer | 3-6,2-6 |
| ITF Portugal F3 | 2017/03/15 15:05 | Joao Monteiro v Guy Den Heijer | 6-0,7-6 |
| ITF Portugal F3 Qual | 2017/03/13 14:00 | Guy Den Heijer v Bart Van Den Berg | 6-2,7-5 |
| ITF Portugal F3 Qual | 2017/03/12 16:00 | Guy Den Heijer v Luis Diego Chavez Villalpando | 6-7,6-4,6-3 |
| ITF Portugal F3 Qual | 2017/03/12 10:00 | Guy Den Heijer v Sebastien Mentha | 6-3,6-2 |
| ITF Portugal F2 | 2017/03/06 14:00 | Simon Carr v Guy Den Heijer | 6-4,6-1 |
| ITF Portugal F2 | 2017/03/05 17:00 | Javier L D Guevara Hi v Guy Den Heijer | 6-7,4-6 |
| Challenger Poprad Tatry Qual | 2017/06/17 08:00 | Luca Margaroli v Fred Simonsson | 7-5,6-2 |
| ITF Sweden F2 | 2017/05/16 12:30 | Fred Simonsson v Martin Cuevas | 2-6,6-7 |
| ITF Sweden F1 | 2017/05/08 10:30 | Fred Simonsson v Karl Friberg | 4-6,5-7 |
| ITF USA F13 Qual | 2017/04/10 15:00 | Fred Simonsson v Tim Kopinski | 6-2,0-6,2-6 |
| ITF USA F13 Qual | 2017/04/09 16:00 | Fred Simonsson v Nicholas Shamma | 6-4,6-3 |
| ITF USA F12 Qual | 2017/04/02 14:00 | Fred Simonsson v Nicholas Shamma | 3-6,4-6 |
| ITF USA F12 Qual | 2017/04/01 15:30 | Fred Simonsson v Arsav Mohanty | 6-2,6-1 |
| ITF USA F11 | 2017/03/23 17:00 | Fred Simonsson v Tommy Paul | 5-7,3-6 |