Stadium: Center Round: 45 Ground: Hardcourt outdoor
| 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 |
| Challenger Karshi Qual | 2018/05/07 05:30 | Shuichi Sekiguchi v N. Vijay Sundar Prashanth | 6-7,6-4,7-6 |
| Challenger Karshi Qual | 2018/05/06 06:00 | Oleksandr Bielinskyi v N. Vijay Sundar Prashanth | 2-6,2-6 |
| Challenger Karshi Qual | 2018/05/05 07:55 | Timur Khabibulin v N. Vijay Sundar Prashanth | 7-5,3-6,0-6 |
| ITF Korea F5 | 2018/08/25 01:00 | Cheong-Eui Kim v Ji Sung Nam | 2-6,3-6 |
| ITF Korea F5 | 2018/08/24 01:15 | Cheong-Eui Kim v Jae Hwan Kim | 6-3,6-3 |
| ITF Korea F5 | 2018/08/23 02:00 | Cheong-Eui Kim v Seong Taek Im | 7-6,6-0 |
| ITF Korea F5 | 2018/08/21 03:15 | Cheong-Eui Kim v Juan Ignacio Batalla | 6-1,6-2 |
| Challenger Gwangju | 2018/08/14 01:00 | Cheong-Eui Kim v Sidharth Rawat | 5-7,7-6,2-6 |
| ITF Indonesia F2 | 2018/08/03 02:00 | Cheong-Eui Kim v Kaito Uesugi | 4-6,6-7 |
| ITF Indonesia F2 | 2018/08/02 03:00 | Cheong-Eui Kim v Sho Shimabukuro | 6-4,6-4 |
| ITF Indonesia F2 | 2018/08/01 02:30 | Cheong-Eui Kim v Cing-Yang Meng | 6-1,6-1 |