Round: 62 Ground: Clay
| ITF Japan F8 | 2017/06/10 05:00 | Luca Castelnuovo v Maesaki, Naoya | 6-3,6-4 |
| ITF Japan F7 | 2017/06/04 01:00 | Rio Noguchi v Luca Castelnuovo | 6-1,6-1 |
| ITF Japan F7 | 2017/06/03 01:00 | Daisuke Sumizawa v Luca Castelnuovo | 3-6,3-6 |
| ITF Japan F6 | 2017/05/30 02:20 | Masaya Kobayashi v Luca Castelnuovo | 6-4,7-6 |
| ITF Japan F6 Qual | 2017/05/29 01:00 | Luca Castelnuovo v Tagashira, Kento | 7-5,6-1 |
| ITF Japan F6 Qual | 2017/05/27 01:00 | Luca Castelnuovo v Verryth, Mark | 6-3,6-2 |
| ITF Qatar F3 Qual | 2017/04/16 13:25 | Luca Castelnuovo v Nickels, Christophe | 6-7,5-7 |
| ITF Qatar F2 Qual | 2017/04/10 14:40 | Luca Castelnuovo v Shakhnubaryan, Artur | 4-6,3-6 |
| ITF Japan F8 | 2017/06/11 03:00 | Sakai, Yuto v Shinji Hazawa | 6-1,6-4 |
| ITF Japan F6 | 2017/06/01 04:10 | Sakai, Yuto v Sora Fukuda | 6-7,3-6 |
| ITF Japan F6 | 2017/05/31 01:00 | Sakai, Yuto v Sora Fukuda | 6-7,3-6 |
| ITF Japan F6 | 2017/05/30 03:30 | Sakai, Yuto v Onozawa, Arata | 7-6,7-5 |
| ITF Japan F6 Qual | 2017/05/29 01:00 | Watanuki, Keisuke v Sakai, Yuto | 6-7,6-7 |
| ITF Japan F6 Qual | 2017/05/28 07:00 | Watanuki, Keisuke v Sakai, Yuto | 6-7,6-7 |
| ITF Japan F5 | 2017/04/01 01:00 | Sakai, Yuto v Kazuki Nishiwaki | 2-6,6-7 |
| ITF Japan F3 | 2017/03/18 06:00 | Vinsant, Shane v Sakai, Yuto | 6-3,6-2 |