Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| 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 |
| Challenger Qujing | 2018/03/20 03:35 | Salvatore Caruso v Zihao Xia | 6-3,6-1 |
| Challenger Shenzhen Qual | 2018/03/11 03:50 | Jason Kubler v Zihao Xia | 6-1,6-1 |
| Challenger Zhuhai | 2018/03/06 04:40 | Di Wu v Zihao Xia | 6-4,6-4 |
| Challenger Zhuhai Qual | 2018/03/04 08:45 | Kuan-Yi Lee v Zihao Xia | 6-7,1-6 |
| Challenger Zhuhai Qual | 2018/03/03 02:00 | Zihao Xia v Andrea Pellegrino | 6-2,6-4 |
| Challenger Glasgow | 2018/05/04 13:50 | Harri Heliovaara v Matteo Viola | 7-5,2-6,5-7 |
| Challenger Glasgow | 2018/05/03 15:00 | James Ward v Harri Heliovaara | 5-7,4-6 |
| Challenger Glasgow | 2018/05/01 10:45 | Harri Heliovaara v Jonathan Gray | 6-3,6-1 |
| Challenger Glasgow Qual | 2018/04/29 15:00 | Harri Heliovaara v Adrien Bossel | 2-6,7-6,6-4 |
| Challenger Glasgow Qual | 2018/04/28 14:20 | Harri Heliovaara v Scott Duncan | 6-1,6-4 |
| Davis Cup | 2018/04/08 10:30 | Harri Heliovaara v Ricardas Berankis | 2-6,3-6 |
| Davis Cup | 2018/04/07 13:00 | Harri Heliovaara v Laurynas Grigelis | 6-3,1-6,6-3 |
| ITF Israel F3 | 2018/03/24 07:00 | Yannick Vandenbulcke v Harri Heliovaara | 6-2,6-2 |