Stadium: Court 1 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Monastir | 2021/08/29 10:30 | Koay, Hao Sheng v Chavez Villalpando, Luis Diego | 4-6,6-4,9-11 |
| Coupe Davis | 2017/07/21 05:30 | Koay, Hao Sheng v Ali Mutawa, Jabor Mohammed | 6-7,6-1,4-6 |
| ITF Sri Lanka F2 | 2017/06/27 03:00 | Samaha, Giovani v Koay, Hao Sheng | 6-3,6-2 |
| Sri Lanka F1, Singles Qualifying | 2017/06/20 03:30 | Dzhavakian, Yurii v Koay, Hao Sheng | 6-4,6-1 |
| Sri Lanka F1, Singles Qualifying | 2017/06/18 04:00 | Sood, Chandril v Koay, Hao Sheng | 6-3,6-7,3-6 |
| Sri Lanka F1, Singles Qualifying | 2017/06/17 04:00 | Koay, Hao Sheng v Byreddy, Sai Saran Reddy | 6-1,2-6,6-2 |
| Coupe Davis | 2016/03/06 04:30 | Hung, Jui-Chen v Koay, Hao Sheng | 7-5,6-1 |
| WTA Kuala Lumpur Qual | 2014/09/21 04:40 | Ward, James v Koay, Hao Sheng | 6-0,6-0 |
| ITF - M15 Monastir | 2021/08/31 08:00 | August Holmgren v Johannes Ingildsen | 4-6,6-7 |
| ITF - M15 Monastir | 2021/08/30 10:00 | Johannes Ingildsen v Michael Zhu | 6-2,6-0 |
| ITF - M15 Monastir | 2021/08/29 08:00 | Nemakal, Ajay Pruthvi v Johannes Ingildsen | 2-6,1-6 |
| ITF M15 Frederiksberg | 2021/08/06 09:00 | Hannestad, Benjamin v Johannes Ingildsen | 2-6,7-6,6-2 |
| ITF M15 Frederiksberg | 2021/08/05 08:00 | Johannes Ingildsen v Zukas, Matias | 6-3,6-1 |
| ITF M15 Frederiksberg | 2021/08/04 09:40 | Elmer Moller v Johannes Ingildsen | 5-7,1-6 |
| ITF M15 Vejle | 2021/07/25 11:00 | Yannik Steinegger v Johannes Ingildsen | 6-4,6-2 |
| UTR Pro Tennis Series Copenhagen | 2021/06/15 14:15 | Philip Hjorth v Johannes Ingildsen | 6-3,6-1 |