| Challenger Stockton Qual | 2017/10/02 17:00 | Sebastian Korda v Frederik Nielsen | 5-7,1-6 |
| Challenger Stockton Qual | 2017/10/01 18:40 | Frederik Nielsen v Alejandro Gonzalez | 6-4,6-1 |
| Challenger Stockton Qual | 2017/09/30 18:30 | Curtis Clarke v Frederik Nielsen | 1-6,4-6 |
| Davis Cup | 2017/09/17 10:00 | Frederik Nielsen v Lloyd Harris | 1-6,6-1,4-6,3-6 |
| Davis Cup | 2017/09/15 13:00 | Frederik Nielsen v Nicolaas Scholtz | 6-4,6-2,6-3 |
| ITF France F18 | 2017/09/04 12:55 | Frederik Nielsen v Romain Bauvy | 6-0,6-7,4-6 |
| ITF France F18 Qual | 2017/09/03 14:25 | Frederik Nielsen v Tommaso Metti | 6-2,6-4 |
| ITF France F18 Qual | 2017/09/02 13:20 | Frederik Nielsen v Louis Dussin | 6-1,6-2 |
| ITF Turkey F36 | 2017/09/25 07:30 | Ryota Tanuma v Philipp Schroll | 3-6,3-6 |
| ITF Turkey F36 | 2017/09/24 07:30 | Ryota Tanuma v Laelson Rodrigues | 6-1,6-0 |
| ITF Turkey F35 | 2017/09/21 07:30 | Ryota Tanuma v Johann Willems | 7-6,0-6,1-6 |
| ITF Turkey F35 | 2017/09/19 07:30 | Antun Vidak v Ryota Tanuma | 4-6,2-6 |
| ITF Romania F12 | 2017/08/29 10:10 | Ryota Tanuma v Andrei Stefan Apostol | 4-6,2-6 |
| ITF Romania F11 | 2017/08/22 11:25 | Bogdan Borza v Ryota Tanuma | 6-4,6-2 |
| ITF Romania F10 | 2017/08/15 07:00 | Ben Patael v Ryota Tanuma | 6-2,6-3 |
| ITF Romania F9 | 2017/08/08 12:05 | Dragos Nicolae Madaras v Ryota Tanuma | 1-6,6-1,6-1 |