| ITF Romania F3 | 2017/06/13 07:00 | Nicolae Frunza v Jorge Montero | 6-3,6-4 |
| ITF Romania F1 | 2017/05/21 08:00 | Sam Riffice v Nicolae Frunza | 3-6,3-6 |
| ITF Romania F1 | 2017/05/20 08:00 | Nicolae Frunza v Carlos Gomez-Herrera | 6-2,6-4 |
| ITF Romania F1 | 2017/05/19 09:45 | Nicolae Frunza v Filip Horansky | 6-4,6-4 |
| ITF Romania F1 | 2017/05/18 08:50 | Nicolae Frunza v Jakob Sude | 6-7,7-6,7-6 |
| ITF Romania F1 | 2017/05/17 08:35 | Nicolae Frunza v Andrei Stefan Apostol | 6-4,3-6,6-4 |
| ITF Italy F5 | 2017/03/22 10:05 | Nicolae Frunza v Alexey Vatutin | 6-7,5-7 |
| ITF Italy F5 | 2017/03/21 12:05 | Giovanni Rizzuti v Nicolae Frunza | 2-6,4-6 |
| 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 Hungary F2 | 2017/05/16 09:25 | Michal Schmid v Ken Onishi | 6-2,4-6,4-6 |
| ITF Hungary F1 | 2017/05/11 11:40 | Attila Balazs v Ken Onishi | 6-2,6-2 |
| ITF Hungary F1 | 2017/05/10 08:00 | Alexander Ovcharov v Ken Onishi | 1-6,3-6 |
| ITF Hungary F1 | 2017/05/08 08:00 | Ken Onishi v Aljaz Radinski | 6-3,7-5 |
| ITF Japan F5 | 2017/04/03 06:20 | Ken Onishi v Ryota Tanuma | 6-7,2-6 |