Stadium: Court 6 Round: 45
| Challenger Taipei Qual | 2017/04/16 06:50 | Toshihide Matsui v Yunseong Chung | 7-6,6-4 |
| Challenger Shenzhen - kvalifikace | 2018/03/11 06:00 | Yunseong Chung v Gianluigi Quinzi | 6-7,6-3,5-7 |
| Challenger Zhuhai Qual | 2018/03/04 08:35 | Alex Bolt v Yunseong Chung | 6-4,6-2 |
| Challenger Zhuhai Qual | 2018/03/03 06:50 | Yunseong Chung v Andrea Vavassori | 6-3,4-6,6-3 |
| Challenger Jokohama | 2018/02/27 02:25 | Yunseong Chung v Jason Jung | 2-6,7-6,4-6 |
| Challenger Yokohama Qual | 2018/02/26 04:05 | Makoto Ochi v Yunseong Chung | 3-6,6-1,1-6 |
| Challenger Yokohama Qual | 2018/02/25 02:35 | Yunseong Chung v Takuto Niki | 6-7,6-3,6-3 |
| Challenger Yokohama Qual | 2018/02/24 05:05 | Masato Shiga v Yunseong Chung | 0-6,5-7 |
| ITF Spain F4 | 2018/02/08 11:00 | Ivan Gakhov v Yunseong Chung | 6-4,6-4 |
| Challenger Shenzhen - kvalifikace | 2018/03/11 03:10 | Toshihide Matsui v Renta Tokuda | 2-6,3-6 |
| Australian Open WC Qual | 2017/11/28 03:25 | Lingxi Zhao v Toshihide Matsui | 6-4,7-5 |
| Challenger Toyota Qual | 2017/11/12 07:05 | Hiroyasu Ehara v Toshihide Matsui | 6-4,7-6 |
| Challenger Toyota Qual | 2017/11/11 08:00 | Toshihide Matsui v Makoto Ochi | 6-4,7-6 |
| Challenger Toyota Qual | 2017/11/11 04:10 | Kazuki Nishiwaki v Toshihide Matsui | 3-6,4-6 |
| Challenger Suzhou Qual | 2017/10/22 04:00 | Sidharth Rawat v Toshihide Matsui | 6-3,6-4 |
| Challenger Suzhou Qual | 2017/10/21 03:00 | Zhuoyang Qiu v Toshihide Matsui | 3-6,6-1,3-6 |
| Challenger Tashkent Qual | 2017/10/07 05:00 | Grigoriy Lomakin v Toshihide Matsui | 3-6,6-3,3-6 |