Round: 25 Ground: Clay
| ITF Poland F5 | 2017/07/15 10:55 | Laurynas Grigelis v Antonio Massara | 6-1,6-2 |
| ITF Poland F5 | 2017/07/14 12:20 | Laurynas Grigelis v Pawel Juszczak | 6-7,6-3,6-2 |
| ITF Poland F5 | 2017/07/13 15:15 | Laurynas Grigelis v Thibault Cancel | 6-2,6-3 |
| ITF Poland F5 | 2017/07/12 11:45 | Laurynas Grigelis v Agustin Velotti | 7-6,6-3 |
| ITF Poland F4 | 2017/07/09 11:30 | Laurynas Grigelis v Alexei Popyrin | 3-6,6-3,3-6 |
| ITF Poland F4 | 2017/07/08 11:35 | Laurynas Grigelis v Billy Harris | 6-2,6-4 |
| ITF Poland F4 | 2017/07/07 11:05 | Laurynas Grigelis v Samuel Bensoussan | 6-2,6-1 |
| ITF Poland F4 | 2017/07/06 11:00 | Laurynas Grigelis v Ewan Moore | 6-3,6-2 |
| ITF Guam F1 | 2017/06/22 01:30 | Keisuke Numajiri v Ju-Hae Moon | 3-6,3-6 |
| ITF Guam F1 | 2017/06/19 01:15 | Per Nordstrom v Keisuke Numajiri | 1-6,3-6 |
| ITF Japan F7 | 2017/06/03 04:00 | Shoma Kato v Keisuke Numajiri | 6-4,6-1 |
| ITF Turkey F19 Qual | 2017/05/14 07:00 | Keisuke Numajiri v Alexander Pavlioutchenkov | 5-7,6-2,3-6 |
| ITF Turkey F18 | 2017/05/10 08:05 | Dennis Novak v Keisuke Numajiri | 6-1,6-0 |
| ITF Turkey F14 | 2017/04/10 07:30 | Keisuke Numajiri v Filip Brtnicky | 1-6,3-6 |
| ITF Turkey F14 | 2017/04/09 07:00 | Keisuke Numajiri v Sami Ben Abdennibi | 6-2,3-6,6-3 |
| ITF Turkey F13 | 2017/04/02 07:30 | Keisuke Numajiri v Mert Naci Turker | 7-6,2-6,3-6 |