Stadium: Indoor Court 2 Round: 46 Ground: Hardcourt outdoor
| Challenger Liuzhou | 2018/10/20 06:35 | Sumit Nagal v Zihao Xia | 6-2,6-2 |
| Challenger Ningbo | 2018/10/16 06:00 | Sumit Nagal v Thomas Fabbiano | 6-4,4-6,2-6 |
| Challenger Tashkent | 2018/10/06 06:30 | Rubin Statham v Sumit Nagal | 3-6,6-1,6-1 |
| Challenger - Sibiu | 2018/09/18 07:00 | Sumit Nagal v Pedro Sousa | 2-6,4-6 |
| Challenger - Szczecin | 2018/09/08 11:20 | Sumit Nagal v Gonzalo Lama | 4-6,4-6 |
| Challenger – Genova | 2018/09/06 09:00 | Cristian Garin v Sumit Nagal | 3-6,6-3,6-4 |
| Challenger – Genova | 2018/09/04 15:15 | Stefano Napolitano v Sumit Nagal | 4-6,2-6 |
| Challenger – Genova | 2018/09/03 09:20 | Sumit Nagal v Juan Pablo Varillas | 6-1,6-4 |
| Challenger Liuzhou | 2018/10/20 08:00 | Linang Xiao v Khumoyun Sultanov | 4-6,3-6 |
| Challenger Tashkent | 2018/10/08 12:40 | Khumoyun Sultanov v Akira Santillan | 6-7,4-6 |
| Challenger Almaty 2 | 2018/10/02 04:00 | Mohamed Safwat v Khumoyun Sultanov | 6-2,4-6,7-6 |
| Challenger Almaty 2 | 2018/10/01 04:00 | Rubin Statham v Khumoyun Sultanov | 4-6,6-7 |
| Challenger Almaty 2 | 2018/09/30 06:55 | Roman Khassanov v Khumoyun Sultanov | 1-6,0-6 |
| Challenger Almaty 2 | 2018/09/29 09:20 | Khumoyun Sultanov v Tobias Simon | 7-6,6-4 |
| Challenger - Astana | 2018/07/19 06:30 | Khumoyun Sultanov v Sebastian Ofner | 3-6,3-6 |
| Challenger - Astana | 2018/07/17 05:30 | Farrukh Dustov v Khumoyun Sultanov | 4-6,2-6 |