Stadium: Center Round: 45 Ground: Hardcourt outdoor
| 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 – Genova | 2018/09/02 14:45 | Sumit Nagal v Jan Satral | 6-2,6-7,6-4 |
| Challenger Ningbo | 2018/10/15 04:25 | Hubert Hurkacz v Zihao Xia | 6-3,7-6 |
| ATP Chengdu | 2018/09/22 05:00 | Zihao Xia v Prajnesh Gunneswaran | 2-6,5-7 |
| Challenger Gwangju | 2018/08/16 06:00 | Zihao Xia v Ji Sung Nam | 2-6,3-6 |
| Challenger Gwangju | 2018/08/14 06:30 | Yusuke Takahashi v Zihao Xia | 2-6,6-1,2-6 |
| Challenger Jinan | 2018/08/11 09:45 | James Ward v Zihao Xia | 6-2,6-1 |
| Challenger Jinan | 2018/08/09 07:30 | Di Wu v Zihao Xia | 4-6,2-6 |
| Challenger Chengdu | 2018/08/01 06:15 | Akira Santillan v Zihao Xia | 3-6,6-2,7-5 |
| Challenger Chengdu | 2018/07/31 03:00 | Zihao Xia v Go Soeda | 7-6,6-3 |