Ground: Hardcourt outdoor
| ITF Japan F3 | 2014/03/26 01:00 | Duckhee Lee v Katsuki Nagao | 6-0,6-7,7-6 |
| ITF Turkey F32 | 2014/09/17 09:00 | Shonigmatjon Shofayziyev v Katsuki Nagao | 4-6,2-6 |
| ITF Japan F8 | 2014/06/27 01:00 | Katsuki Nagao v Yoshihito Nishioka | 0-6,4-6 |
| ITF Japan F7 | 2014/06/19 01:00 | Katsuki Nagao v Yohei Ono | 5-7,5-7 |
| ITF Japan F6 | 2014/06/10 01:30 | Katsuki Nagao v Jui-Chen Hung | 6-7,7-5,2-6 |
| ITF Japan F5 | 2014/06/04 01:00 | Hiromasa Oku v Katsuki Nagao | 7-6,7-6 |
| ITF Japan F5 | 2014/06/02 01:00 | Issei Okamura v Katsuki Nagao | 1-6,6-7 |
| ITF Guam F1 | 2014/05/30 00:00 | Yuya Kibi v Katsuki Nagao | 6-3,6-3 |
| ITF Guam F1 | 2014/05/29 00:00 | Kody Pearson v Katsuki Nagao | 1-6,1-6 |
| ITF Turkey F32 | 2014/09/17 09:00 | Scott Clayton v Duckhee Lee | 0-6,6-4,3-6 |
| ITF China F9 | 2014/07/24 04:15 | Nikola Milojevic v Duckhee Lee | 6-4,6-4 |
| ITF China F9 | 2014/07/23 06:00 | Zhaoyi Cao v Duckhee Lee | 1-6,4-6 |
| ITF China F9 | 2014/07/22 03:50 | Zhao-Tai Li v Duckhee Lee | 0-6,4-6 |
| ITF Hong Kong F1 | 2014/07/12 02:00 | Wishaya Trongcharoenchaikul v Duckhee Lee | 1-6,4-6 |
| ITF Hong Kong F1 | 2014/07/11 04:35 | Duckhee Lee v Yuichi Ito | 6-1,6-4 |
| ITF Hong Kong F1 | 2014/07/10 06:10 | Duckhee Lee v Evan Song | 7-6,6-4 |
| ITF Hong Kong F1 | 2014/07/08 07:10 | Duckhee Lee v Atsushi Ushida | 7-5,6-2 |