Round: 54 Ground: Hardcourt outdoor
| ITF Hong Kong F1 | 2017/06/22 03:00 | Nagao, Katsuki v Jumpei Yamasaki | 3-6,1-6 |
| ITF Hong Kong F1 | 2017/06/21 07:00 | Ye Cong Mo v Nagao, Katsuki | 2-6,4-6 |
| ITF Japan F8 | 2017/06/15 03:30 | Kikuchi, Gengo v Nagao, Katsuki | 6-2,6-2 |
| ITF Japan F8 | 2017/06/14 03:00 | Nagao, Katsuki v Taisei Ichikawa | 6-0,6-1 |
| ITF Japan F7 | 2017/06/03 01:00 | Nagao, Katsuki v Kawakami, Rimpei | 6-7,6-7 |
| ITF Japan F5 | 2017/04/04 04:40 | Tatsuma Ito v Nagao, Katsuki | 7-6,6-4 |
| ITF Japan F5 | 2017/04/01 02:00 | Nagao, Katsuki v Shimizu, Kazuki | 6-3,6-3 |
| ITF Japan F4 | 2017/03/28 01:00 | Nagao, Katsuki v Takeshima, Shunrou | 2-6,2-6 |
| ITF Guam F1 | 2017/06/19 06:00 | Barclay, David v Takeshima, Shunrou | 2-6,1-6 |
| ITF Japan F6 Qual | 2017/05/27 01:00 | Barclay, David v Tagashira, Kento | 4-6,3-6 |
| ITF Australia F2 Qual | 2017/03/10 23:00 | Barclay, David v Casey, Oliver | 6-3,7-5 |
| ITF Australia F1 | 2017/03/08 01:30 | Barclay, David v Tearney, Finn | 4-6,1-6 |
| Launceston, Australia | 2017/02/03 23:00 | Barclay, David v Yang, Tsung-Hua | 2-6,3-6 |
| Challenger - Burnie - Qualifications | 2017/01/27 23:00 | Polkinghorne, Darren v Barclay, David | 6-4,6-4 |
| ITF Australia F10 Qual | 2016/11/12 23:00 | Puodziunas, Scott v Barclay, David | 6-3,4-6,7-6 |
| ITF Australia F9 | 2016/11/09 01:50 | Barclay, David v Jenkins, Jarmere | 1-6,1-6 |