| ITF Guam F1 | 2014/05/30 02:15 | Woong-Sun Jun v Takuto Niki | 4-6,6-7 |
| ITF Korea F1 | 2014/04/23 01:00 | Takuto Niki v Woong-Sun Jun | 6-1,6-4 |
| ITF Hong Kong F2 | 2015/06/16 05:00 | Woong-Sun Jun v Marcos Giraldi Requena | 2-6,3-6 |
| ITF Hong Kong F1 | 2015/06/09 03:45 | Cheng-Yu Yu v Woong-Sun Jun | 6-4,6-1 |
| ITF Japan F6 | 2014/06/13 00:00 | Woong-Sun Jun v Shunrou Takeshima | 7-6,1-6,4-6 |
| ITF Japan F6 | 2014/06/10 06:05 | Hiroka Kondo v Woong-Sun Jun | 3-6,4-6 |
| ITF Guam F1 | 2014/05/30 02:15 | Woong-Sun Jun v Takuto Niki | 4-6,6-7 |
| ITF Korea F1 | 2014/04/23 01:00 | Takuto Niki v Woong-Sun Jun | 6-1,6-4 |
| ITF Korea F1 Qual | 2014/04/21 03:50 | Woong-Sun Jun v Jae Hwan Kim | 3-6,6-1,7-6 |
| ITF Japan F4 | 2014/04/02 04:45 | Yuya Kibi v Woong-Sun Jun | 6-2,6-7,6-2 |
| ITF Japan F6 | 2015/06/13 01:30 | Takuto Niki v Toshihide Matsui | 3-6,2-6 |
| ITF Japan F6 | 2015/06/12 05:30 | Takuto Niki v Masaki Sasai | 6-2,6-1 |
| ITF Japan F6 | 2015/06/11 02:55 | Takuto Niki v Keisuke Watanuki | 6-7,7-6,6-4 |
| ITF China F6 | 2015/05/28 02:00 | Xin Gao v Takuto Niki | 6-2,7-6 |
| ITF China F6 | 2015/05/26 07:25 | Xiao Gong v Takuto Niki | 2-6,2-6 |
| ITF Japan F4 | 2015/04/04 01:30 | Yasutaka Uchiyama v Takuto Niki | 6-1,6-2 |
| ITF Japan F4 | 2015/04/03 01:30 | Zhe Li v Takuto Niki | 2-6,2-6 |
| ITF Japan F4 | 2015/04/02 03:15 | Yong-Kyu Lim v Takuto Niki | 2-6,2-6 |