Stadium: Court 12 Round: 44 Ground: Hardcourt outdoor
| ITF Latvia F1 | 2017/07/31 07:00 | Numajiri, Keisuke v Lebedyn, Alexander | 3-6,6-1,3-6 |
| ITF Latvia F1 | 2017/07/29 11:30 | Numajiri, Keisuke v Randpere, Martin Valdo | 6-2,6-4 |
| ITF Estonia F1 | 2017/07/25 08:00 | von Massow, George v Numajiri, Keisuke | 6-2,6-2 |
| ITF Estonia F1 | 2017/07/23 13:00 | Numajiri, Keisuke v Boerma, Pelle | 5-7,6-4,6-1 |
| ITF Estonia F1 | 2017/07/23 07:00 | Numajiri, Keisuke v Hedman, Alex | 6-3,6-2 |
| ITF Lithuania F1 | 2017/07/18 12:45 | Grigelis, Laurynas v Numajiri, Keisuke | 6-1,6-3 |
| ITF Guam F1 | 2017/06/22 01:30 | Numajiri, Keisuke v Moon, Ju-Hae | 3-6,3-6 |
| ITF Guam F1 | 2017/06/19 01:15 | Nordstrom, Per v Numajiri, Keisuke | 1-6,3-6 |
| ITF Austria F6 | 2017/08/08 09:55 | Sandro Kopp v Elliot Benchetrit | 0-6,3-6 |
| ITF Austria F4 Qual | 2017/07/22 10:00 | Jonas Trinker v Sandro Kopp | 6-3,6-1 |
| ITF Austria F3 | 2017/07/15 07:00 | Bachmaier, Philip v Sandro Kopp | 6-3,7-5 |
| ITF Austria F2 | 2017/07/12 08:30 | Khomentovskiy, Matvey v Sandro Kopp | 6-4,6-3 |
| ITF Austria F1 | 2017/07/01 11:00 | Sandro Kopp v Zaplotnik, Matic | 7-5,5-7,1-6 |
| ITF Austria F1 | 2017/07/01 07:00 | Forster, Robin v Sandro Kopp | 0-6,0-6 |
| Turkey F16, Singles Qualifying | 2017/04/24 07:30 | Sandro Kopp v Mora, Daniel | 2-6,1-6 |
| Turkey F16, Singles Qualifying | 2017/04/23 07:00 | Kossler, Bernd v Sandro Kopp | 3-6,1-6 |