| ITF韩国F3 | 2018/06/18 06:30 | Tae-Woo Lee v 金永硕 | 1-6,7-6,4-6 |
| ITF韩国F2 | 2018/06/13 06:50 | 金永硕 v 南姬宋 | 6-7,0-6 |
| ITF韩国F1 | 2018/06/06 02:50 | 金永硕 v 金载焕 | 4-6,4-6 |
| 釜山挑战赛 | 2018/05/15 02:00 | 金永硕 v 马科斯•吉隆 | 3-6,3-6 |
| 金泉挑战赛资格赛 | 2018/05/06 04:30 | Renta Tokuda v 金永硕 | 6-3,6-2 |
| 金泉挑战赛资格赛 | 2018/05/05 06:00 | 金永硕 v Dong Ju Kim | 6-1,6-3 |
| 挑战者 首尔 | 2018/05/01 04:35 | 乔丹•汤普森 v 金永硕 | 6-1,6-2 |
| ITF泰国F12资格赛 | 2017/12/10 03:00 | 金永硕 v Young-Hoon Jeong | 4-6,3-6 |
| ITF韩国F3 | 2018/06/19 08:10 | Seung-Hun Shin v Jumpei Yamasaki | 6-4,2-6,1-6 |
| ITF韩国F2 | 2018/06/14 01:00 | 鞠海文 v Jumpei Yamasaki | 6-4,7-5 |
| ITF韩国F2 | 2018/06/12 01:00 | Tae-Woo Lee v Jumpei Yamasaki | 3-6,0-6 |
| ITF日本F7 | 2018/06/08 01:00 | 野口莉央 v Jumpei Yamasaki | 6-2,6-0 |
| ITF日本F7 | 2018/06/07 04:50 | Kaito Itsusaki v Jumpei Yamasaki | 3-6,4-6 |
| ITF日本F7 | 2018/06/04 03:10 | 清水一希 v Jumpei Yamasaki | 2-6,4-6 |
| ITF中国F6 | 2018/05/16 02:00 | Jumpei Yamasaki v 竹内研人 | 4-6,6-4,6-7 |
| ITF中国F6 | 2018/05/14 05:45 | 王慧鑫 v Jumpei Yamasaki | 3-6,3-6 |