Round: 25 Ground: Clay
| ITF Austria F2 | 2017/07/10 11:00 | Ken Onishi v Jeremy Jahn | 3-6,6-7 |
| ITF Czech Republic F4 | 2017/07/05 10:30 | Jonathan Mridha v Ken Onishi | 6-2,6-1 |
| ITF Czech Republic F4 | 2017/07/04 09:35 | Ken Onishi v Michal Konecny | 3-6,6-4,7-5 |
| ITF Romania F4 | 2017/06/21 09:45 | Ken Onishi v Adrian Ungur | 2-6,0-6 |
| ITF Romania F3 | 2017/06/15 07:00 | Nicolae Frunza v Ken Onishi | 6-4,6-1 |
| ITF Romania F3 | 2017/06/14 07:00 | Riccardo Maiga v Ken Onishi | 7-6,1-6,2-6 |
| ITF Hungary F3 | 2017/05/24 09:30 | Ken Onishi v Gabor Borsos | 1-6,1-6 |
| ITF Hungary F2 | 2017/05/17 08:00 | Ken Onishi v Tomislav Jotovski | 6-4,2-6,4-6 |
| ITF Netherlands F4 | 2017/07/09 08:00 | Alessandro Ricci v Bart Brons | 4-6,1-6 |
| ITF Belgium F1 Qual | 2017/06/18 13:10 | Alessandro Ricci v Nico Mertens | 1-6,1-6 |
| ITF Czech Republic F3 Qual | 2017/05/29 11:00 | Alessandro Ricci v Lukas Vejvara | 0-6,5-7 |
| ITF Czech Republic F3 Qual | 2017/05/28 09:30 | Alessandro Ricci v Michal Lusovsky | 6-2,6-3 |
| ITF Italy F8 | 2017/04/10 08:00 | Jakob Sude v Alessandro Ricci | 6-2,6-4 |
| ITF Italy F7 Qual | 2017/04/02 07:30 | Adrian Bodmer v Alessandro Ricci | 6-1,6-2 |
| ITF Italy F7 Qual | 2017/04/01 07:30 | Marcel Marlon Sudzum v Alessandro Ricci | 1-6,0-6 |
| ITF Egypt F8 | 2017/03/04 08:00 | Alessandro Ricci v Yvo Panak | 6-7,6-3,3-6 |