Stadium: Court 2 Round: 45 Ground: Hardcourt outdoor
| Challenger Shanghai | 2018/09/11 07:00 | Aldin Setkic v Yunseong Chung | 6-3,6-4 |
| Challenger Zhangjiagang | 2018/09/07 03:00 | Yunseong Chung v Alexander Bublik | 4-6,4-6 |
| Challenger Zhangjiagang | 2018/09/06 02:00 | Go Soeda v Yunseong Chung | 5-7,6-3,2-6 |
| Challenger Zhangjiagang | 2018/09/05 02:00 | Yunseong Chung v Roman Safiullin | 3-6,6-4,6-3 |
| Challenger Gwangju | 2018/08/14 01:00 | Yunseong Chung v Benjamin Lock | 4-6,6-4,3-6 |
| Challenger Lexington | 2018/08/04 19:50 | Yunseong Chung v Stefano Napolitano | 5-7,3-6 |
| Challenger Lexington | 2018/08/02 14:00 | Jeffrey John Wolf v Yunseong Chung | 3-6,7-6,5-7 |
| Challenger Lexington | 2018/08/01 01:15 | Yunseong Chung v William Bushamuka | 6-2,6-3 |
| Challenger Shanghai | 2018/09/10 03:00 | Aldin Setkic v N. Vijay Sundar Prashanth | 6-4,6-4 |
| Challenger Shanghai | 2018/09/09 03:00 | Ti Chen v N. Vijay Sundar Prashanth | 7-5,2-6,4-6 |
| Challenger Shanghai | 2018/09/08 03:00 | N. Vijay Sundar Prashanth v Cheong-Eui Kim | 6-4,6-3 |
| Challenger Lexington Qual | 2018/07/28 18:05 | Jesse Witten v N. Vijay Sundar Prashanth | 6-4,6-4 |
| Challenger Fergana Qual | 2018/06/16 05:00 | N. Vijay Sundar Prashanth v Mukund Sasikumar | 3-6,4-6 |
| Challenger Surbiton Qual | 2018/06/02 13:20 | N. Vijay Sundar Prashanth v Mark Whitehouse | 4-6,4-6 |
| Challenger Samarkand Qual | 2018/05/13 11:00 | Khumoyun Sultanov v N. Vijay Sundar Prashanth | 6-4,6-3 |
| Challenger Samarkand Qual | 2018/05/12 06:35 | Pavel Tsoy v N. Vijay Sundar Prashanth | 4-6,1-6 |