Stadium: Court 2 Round: 54 Ground: Hardcourt indoor
| ITF France F18 Qual | 2017/09/02 13:20 | Nielsen, Frederik v Louis Dussin | 6-1,6-2 |
| ITF Portugal F18 | 2017/08/29 16:00 | Gonzalez, Wilfredo v Nielsen, Frederik | 3-6,7-5,6-0 |
| Challenger Vancouver Qual | 2017/08/13 18:00 | Nielsen, Frederik v Garanganga, Takanyi | 4-6,7-5,3-6 |
| Challenger Vancouver Qual | 2017/08/12 19:05 | Krajicek, Austin v Nielsen, Frederik | 2-6,3-6 |
| Challenger Aptos | 2017/08/08 18:00 | Nielsen, Frederik v Tennys Sandgren | 2-6,4-6 |
| Aptos, USA, Qualifications | 2017/08/06 18:35 | Nielsen, Frederik v Mousley, Bradley | 6-0,4-6,6-3 |
| Aptos, USA, Qualifications | 2017/08/05 23:00 | Marc Polmans v Nielsen, Frederik | 6-3,1-6,4-6 |
| Challenger Recanati | 2017/07/05 19:00 | Vanni, Luca v Nielsen, Frederik | 6-2,2-6,6-2 |
| ITF France F18 Qual | 2017/09/02 14:20 | Metti, Tommaso v Sizya Ernest Kivanda | 6-4,3-6,6-3 |
| ITF Italy F27 | 2017/08/28 14:50 | Metti, Tommaso v Trevisan, Matteo | 2-6,1-6 |
| ITF Italy F27 Qual | 2017/08/27 08:00 | Metti, Tommaso v Ros, Mattia | 6-1,6-3 |
| ITF Italy F27 Qual | 2017/08/26 09:50 | Metti, Tommaso v Beccuzzi, Enrico | 6-2,6-3 |
| ITF Belgium F7 | 2017/08/01 15:05 | Metti, Tommaso v Vanneste, Jeroen | 1-6,6-4,4-6 |
| ITF Belgium F7 Qual | 2017/07/31 08:00 | Cloes, Loic v Metti, Tommaso | 6-7,2-6 |
| ITF Belgium F7 Qual | 2017/07/30 09:40 | de Bodt, Jeremy v Metti, Tommaso | 0-6,1-6 |
| ITF Belgium F7 Qual | 2017/07/29 08:00 | Buvaysar Gadamauri v Metti, Tommaso | 3-6,2-6 |