Stadium: 2 Round: 1 Ground: Hardcourt indoor
| Davis Cup | 2022/08/11 03:00 | Phuong Van Nguyen v Hao Sheng Koay | 6-1,1-6,6-3 |
| ITF M15 Kuala Lumpur | 2022/07/26 02:15 | Hao Sheng Koay v Keisuke Saitoh | 3-6,1-6 |
| Davis Cup | 2021/09/18 07:00 | Linh Giang Trinh v Hao Sheng Koay | 6-3,7-5 |
| Davis Cup | 2021/09/17 07:00 | Abdulhamid Mubarak v Hao Sheng Koay | 7-5,2-6,4-6 |
| Davis Cup | 2021/09/15 06:55 | Coleman Wong v Hao Sheng Koay | 6-3,6-1 |
| ITF M15 Monastir | 2021/09/05 11:00 | Hao Sheng Koay v Johannes Ingildsen | 6-3,6-7,3-10 |
| ITF M15 Monastir | 2021/08/29 10:30 | Hao Sheng Koay v Luis Diego Chavez Villalpando | 4-6,6-4,9-11 |
| Davis Cup | 2017/07/21 05:30 | Hao Sheng Koay v Jabor Mohammed Ali Mutawa | 6-7,6-1,4-6 |