Round: 54 Ground: Hardcourt outdoor
| ITF Hong Kong F5 | 2017/12/23 02:00 | Chan-Yeong Oh v Alec Adamson | 7-5,6-3 |
| ITF Hong Kong F4 | 2017/12/18 02:00 | Shao-Fan Liu v Chan-Yeong Oh | 7-6,6-2 |
| ITF Korea F4 | 2017/06/22 02:00 | Chan-Yeong Oh v Min-Kyu Song | 5-7,2-6 |
| ITF Korea F4 | 2017/06/20 03:40 | Chan-Yeong Oh v Tae-Woo Lee | 7-6,7-6 |
| ITF Korea F3 | 2017/06/13 02:00 | Min-Kyu Song v Chan-Yeong Oh | 7-5,5-7,6-4 |
| ITF Korea F2 | 2017/06/09 02:00 | Daniel Nguyen v Chan-Yeong Oh | 2-6,6-2,6-4 |
| ITF Korea F2 | 2017/06/08 02:40 | Chan-Yeong Oh v Hong Chung | 7-6,3-6,6-3 |
| ITF Korea F2 | 2017/06/08 02:30 | Chan-Yeong Oh v Hong Chung | 7-6,3-6,5-3 |
| ITF Hong Kong F5 | 2017/12/23 02:00 | Yuto Sakai v Congsup Congcar | 6-4,6-4 |
| Challenger Toyota Qual | 2017/11/11 07:35 | Hiroyasu Ehara v Yuto Sakai | 6-7,6-2,6-3 |
| Challenger Toyota Qual | 2017/11/11 02:15 | Yuto Sakai v Masaki Osafune | 7-6,1-6,6-1 |
| Challenger Kobe Qual | 2017/11/04 05:20 | Yuto Sakai v Sora Fukuda | 1-6,3-6 |
| ITF Japan F8 | 2017/06/15 01:00 | Yuto Sakai v Yusuke Watanuki | 4-6,6-3,3-6 |
| ITF Japan F8 | 2017/06/14 01:00 | Yuto Sakai v Yohei Ono | 7-5,6-0 |
| ITF Japan F8 | 2017/06/12 00:00 | Luca Castelnuovo v Yuto Sakai | 7-6,4-6,6-7 |
| ITF Japan F8 | 2017/06/11 03:00 | Yuto Sakai v Shinji Hazawa | 6-1,6-4 |