Stadium: 9 Round: 54 Ground: Hardcourt outdoor
| ITF M15 Huntsville | 2024/08/11 14:00 | Carson Baker v Hiroki Sakagawa | 7-6,6-4 |
| ITF M15 Tokyo | 2024/07/08 03:30 | Hiroki Sakagawa v Yusaku Sugaya | 4-6,5-7 |
| ITF M15 Tokyo | 2024/07/01 03:30 | Karlis Ozolins v Hiroki Sakagawa | 6-0,6-3 |
| ITF M15 San Diego | 2024/06/10 19:30 | Alexander Petrov v Hiroki Sakagawa | 6-2,6-1 |
| UTR Pro Newport Beach | 2024/05/26 01:00 | Adam Chodur v Hiroki Sakagawa | 6-3,0-0 |
| UTR Pro Newport Beach | 2024/05/24 17:00 | Alessandro-D Ventre v Hiroki Sakagawa | 3-6,6-2,6-4 |
| UTR Pro Newport Beach | 2024/05/23 19:30 | Collin Altamirano v Hiroki Sakagawa | 6-4,4-6,5-3 |
| UTR Pro Newport Beach | 2024/05/21 18:00 | Alex Knaff v Hiroki Sakagawa | 7-5,6-3 |
| UTR Pro Kawaguchi | 2024/06/24 02:44 | Brody Nejedly-Krall v Keisuke Ota | 6-2,2-6,7-5 |