Stadium: Center Court Round: 64 Ground: Hardcourt outdoor
| Challenger - Gwangju | 2018/08/16 06:00 | Xia, Zihao v Nam, Ji Sung | 2-6,3-6 |
| Challenger - Gwangju | 2018/08/14 06:30 | Yusuke Takahashi v Xia, Zihao | 2-6,6-1,2-6 |
| Jinan, China | 2018/08/11 09:45 | Ward, James v Xia, Zihao | 6-2,6-1 |
| Jinan, China | 2018/08/09 07:30 | Wu, Di v Xia, Zihao | 4-6,2-6 |
| Chengdu, China | 2018/08/01 06:15 | Akira Santillan v Xia, Zihao | 3-6,6-2,7-5 |
| Chengdu, China | 2018/07/31 03:00 | Xia, Zihao v Soeda, Go | 7-6,6-3 |
| Challenger Bastad Qual | 2018/07/07 10:55 | Xia, Zihao v Lukas Klein | 1-6,1-6 |
| Challenger Recanati Qual | 2018/07/01 10:05 | Xia, Zihao v Antoine Escoffier | 2-6,3-6 |
| Challenger Kaohsiung | 2018/09/19 05:35 | Gunneswaran, Prajnesh v Jurij Rodionov | 3-6,7-5,3-6 |
| Coupe Davis | 2018/09/14 15:30 | Dusan Lajovic v Gunneswaran, Prajnesh | 6-4,6-3,6-4 |
| Challenger Aptos | 2018/08/11 01:00 | Thanasi Kokkinakis v Gunneswaran, Prajnesh | 4-6,6-4,6-3 |
| Challenger Aptos | 2018/08/08 22:55 | Aragone, JC v Gunneswaran, Prajnesh | 6-4,5-7,4-6 |
| Challenger Aptos | 2018/08/06 21:25 | Brandon Holt v Gunneswaran, Prajnesh | 6-4,4-6,2-6 |
| ATP - Los Cabos | 2018/08/01 00:00 | Cameron Norrie v Gunneswaran, Prajnesh | 6-2,6-2 |
| ATP Los Cabos Qual | 2018/07/29 23:10 | Gunneswaran, Prajnesh v Song, Evan | 6-3,6-1 |
| ATP Los Cabos Qual | 2018/07/29 00:10 | Gunneswaran, Prajnesh v Reyes-Varela, Miguel Angel | 6-4,6-0 |