Stadium: Center Round: 45 Ground: Hardcourt outdoor
| Challenger Almaty | 2018/06/12 07:15 | Sumit Nagal v Uladzimir Ignatik | 7-6,4-6,1-6 |
| French Open Qual | 2018/05/21 08:00 | Martin Klizan v Sumit Nagal | 4-6,6-4,6-1 |
| Challenger Braga | 2018/05/08 11:25 | Sergio Gutierrez-Ferrol v Sumit Nagal | 6-4,6-0 |
| Challenger Ostrava | 2018/04/30 11:00 | Tomislav Brkic v Sumit Nagal | 6-4,3-6,6-1 |
| Challenger Francavilla | 2018/04/24 08:00 | Sumit Nagal v Antoine Hoang | 4-6,2-6 |
| Challenger Barletta | 2018/04/10 11:45 | Sumit Nagal v Goncalo Oliveira | 6-4,3-6,2-6 |
| Davis Cup | 2018/04/06 04:00 | Ze Zhang v Sumit Nagal | 6-4,6-1 |
| Challenger Marbella | 2018/03/28 11:00 | Sumit Nagal v Ramkumar Ramanathan | 2-6,3-6 |
| ITF China F7 | 2018/05/30 02:30 | Di Wu v Zihao Xia | 6-1,6-4 |
| ITF China F7 | 2018/05/28 05:10 | Zihao Xia v Francis Casey Alcantara | 6-4,6-1 |
| ITF China F6 | 2018/05/16 02:00 | Sami Reinwein v Zihao Xia | 6-4,6-3 |
| ITF China F6 | 2018/05/14 05:10 | James Frawley v Zihao Xia | 4-6,3-6 |
| ITF China F5 | 2018/05/08 02:00 | Zihao Xia v Harri Heliovaara | 6-4,3-6,2-6 |
| ITF China F4 | 2018/05/02 03:00 | Fajing Sun v Zihao Xia | 2-6,6-3,6-3 |
| ITF China F4 | 2018/04/30 04:40 | Tianjia Guo v Zihao Xia | 0-6,0-6 |
| Challenger Nanchang | 2018/04/16 04:30 | Zihao Xia v Antoine Escoffier | 4-6,2-6 |