Stadium: Centre Court Round: 25 Ground: Hardcourt outdoor
| Challenger Yokohama | 2018/03/04 02:30 | Yasutaka Uchiyama v Tatsuma Ito | 2-6,6-3,6-4 |
| Challenger Yokohama | 2018/03/03 02:00 | Jordan Thompson v Yasutaka Uchiyama | 4-6,5-7 |
| Challenger Yokohama | 2018/03/02 03:45 | Go Soeda v Yasutaka Uchiyama | 6-4,6-7,3-6 |
| Challenger Yokohama | 2018/03/01 02:00 | Yasutaka Uchiyama v Shinji Hazawa | 6-3,7-5 |
| Challenger Yokohama | 2018/02/27 02:20 | Yasutaka Uchiyama v Hubert Hurkacz | 6-4,3-6,6-4 |
| Challenger Kyoto | 2018/02/21 01:30 | Yasutaka Uchiyama v Michal Przysiezny | 6-4,4-6,6-7 |
| Challenger Chennai | 2018/02/15 06:50 | Yasutaka Uchiyama v Yuki Bhambri | 7-5,2-6,4-6 |
| Challenger Chennai | 2018/02/14 05:30 | Yasutaka Uchiyama v Cem Ilkel | 6-4,7-5 |
| Davis Cup | 2018/02/02 07:40 | Aqeel Khan v Seong Chan Hong | 4-6,7-5,7-5 |
| Challenger Gwangju | 2017/09/19 06:35 | Seong Chan Hong v Luke Saville | 6-2,4-6,6-7 |
| ITF Korea F5 | 2017/06/30 02:00 | Seong Chan Hong v Young Seok Kim | 6-7,4-6 |
| ITF Korea F5 | 2017/06/29 01:30 | Seong Chan Hong v Jung-Woong Na | 6-4,2-6,7-6 |
| ITF Korea F5 | 2017/06/28 01:00 | Seong Chan Hong v Dong-Hak Sin | 7-5,6-3 |
| ITF Korea F5 | 2017/06/27 01:30 | Seong Chan Hong v Seong Jae Han | 6-1,6-3 |
| ITF Korea F5 | 2017/06/26 01:30 | Seong Chan Hong v Seoung Hun Lee | 6-3,6-0 |
| ITF Korea F3 | 2017/06/13 02:00 | Young Seok Kim v Seong Chan Hong | 6-2,6-4 |