Ground: Hardcourt outdoor
| ITF M15 Maanshan | 2025/08/27 05:45 | Vishnu Vardhan v Hao Sheng Koay | 3-6,6-4,7-6 |
| Davis Cup | 2025/07/17 03:00 | Hao Sheng Koay v Abdullah Ali Hatem | 7-6,7-5 |
| ITF M15 Kuala Lumpur | 2023/11/29 02:55 | Hao Sheng Koay v Sora Fukuda | 0-6,3-6 |
| ITF M15 Ipoh Perak | 2023/11/21 05:00 | Hao Sheng Koay v Sheng Tang | 6-3,4-6,4-6 |
| ITF M15 Kuching | 2023/11/13 03:00 | Patrik Oplustil v Hao Sheng Koay | 7-6,5-7,10-7 |
| Davis Cup | 2022/08/13 03:00 | Hao Sheng Koay v Abdulrahman Al Janahi | 6-2,6-2 |
| Davis Cup | 2022/08/12 03:00 | Mohammad Alkotop v Hao Sheng Koay | 3-6,1-6 |
| Davis Cup | 2022/08/11 03:00 | Phuong Van Nguyen v Hao Sheng Koay | 6-1,1-6,6-3 |
| ITF M15 Singapore | 2025/08/14 03:30 | Daniel Abadia v Kousuke Ogura | 2-6,1-6 |