Stadium: Court 5 Round: 25
| ITF Japan F4 | 2017/03/29 05:30 | Chan-Yeong Oh v Yuichi Ito | 4-6,1-6 |
| ITF Malaysia F3 | 2018/07/17 02:00 | Yuichi Ito v Lance-Pierre Du Toit | 2-6,6-4,3-6 |
| ITF Malaysia F2 | 2018/07/10 02:00 | Yuichi Ito v Michail Pervolarakis | 2-6,2-6 |
| ITF Guam F1 | 2018/06/24 00:00 | Yuta Shimizu v Yuichi Ito | 6-3,6-2 |
| ITF Guam F1 | 2018/06/23 02:10 | Thomas Fancutt v Yuichi Ito | 6-7,4-6 |
| ITF Guam F1 | 2018/06/22 01:35 | Yuichi Ito v Niklas Johansson | 7-6,6-1 |
| ITF Guam F1 | 2018/06/21 00:00 | Yuichi Ito v David Barclay | 6-2,6-2 |
| ITF Guam F1 | 2018/06/19 04:30 | Yuichi Ito v Daisuke Sumizawa | 6-3,4-6,6-3 |
| ITF Japan F6 Qual | 2018/04/09 02:30 | Yuichi Ito v Hajime Nakashima | 1-6,1-6 |
| Challenger Gwangju Qual | 2018/08/11 01:30 | Yecong He v Chan-Yeong Oh | 7-6,6-0 |
| ITF Korea F3 | 2018/06/18 01:00 | Cheng-Yu Yu v Chan-Yeong Oh | 6-4,6-2 |
| ITF Korea F2 | 2018/06/15 03:20 | Chan-Yeong Oh v Yunseong Chung | 6-7,6-3,4-6 |
| ITF Korea F2 | 2018/06/14 01:00 | Chan-Yeong Oh v Mitchell Thomas McDaniels | 6-2,3-6,6-3 |
| ITF Korea F2 | 2018/06/13 06:45 | Hong Chung v Chan-Yeong Oh | 2-6,2-6 |
| ITF Korea F2 | 2018/06/11 03:30 | Chan-Yeong Oh v Sang Yeop Kim | 6-3,6-3 |
| ITF Korea F1 | 2018/06/07 01:00 | Chan-Yeong Oh v Tae-Woo Lee | 4-6,2-6 |
| ITF Korea F1 | 2018/06/05 01:00 | Chan-Yeong Oh v Ku Keon Kang | 6-4,6-4 |