Stadium: Court 4 Round: 46
| 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 Qujing Qual | 2018/03/17 03:30 | Mikhail Elgin v Ronald Slobodchikov | 6-0,7-6 |
| Challenger Shenzhen - kvalifikace | 2018/03/11 05:10 | Mikhail Elgin v Xin Gao | 3-6,4-6 |
| Challenger Zhuhai Qual | 2018/03/04 09:50 | Edan Leshem v Mikhail Elgin | 4-6,3-6 |
| Challenger Zhuhai Qual | 2018/03/03 06:20 | Yan Bai v Mikhail Elgin | 3-6,6-4,2-6 |
| Challenger Cherbourg Qual | 2018/02/11 11:00 | Alexandre Muller v Mikhail Elgin | 7-6,2-6,6-2 |
| Challenger Cherbourg Qual | 2018/02/10 12:20 | Quentin Gueydan v Mikhail Elgin | 6-7,1-6 |
| Challenger Bangkok Qual | 2017/12/30 06:50 | Mikhail Elgin v Congsup Congcar | 6-2,7-6 |
| Challenger Bratislava Qual | 2017/11/04 14:30 | Mikhail Elgin v Dzmitry Zhyrmont | 6-1,4-6,6-7 |