Stadium: Sub Court B Round: 25 Ground: Hardcourt outdoor
| ITF M25 Sapporo | 2024/09/02 01:00 | Hiroki Sakagawa v Keisuke Ota | 6-0,6-0 |
| 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 |
| ITF M15 Monastir | 2024/08/14 14:30 | Shinji Hazawa v Savva Polukhin | 2-6,3-6 |
| ITF M15 Monastir | 2024/08/12 17:00 | Shinji Hazawa v Federico Bove | 6-2,6-2 |
| ITF M15 Monastir | 2024/08/12 08:00 | Shinji Hazawa v Rayen Hermassi | 6-0,6-1 |
| ITF M15 Monastir | 2024/08/05 08:00 | Shinji Hazawa v Zaid Mashni | 5-7,2-6 |
| ITF M15 Monastir | 2024/08/04 08:00 | Shinji Hazawa v Sergio Badini | 6-0,6-2 |
| ITF M15 Monastir | 2024/08/03 08:00 | Samir Hamza Reguig v Shinji Hazawa | 6-2,4-6,6-3 |
| ITF M15 Monastir | 2024/08/01 08:00 | Shinji Hazawa v Nathan Trouve | 7-5,7-5 |
| ITF M15 Monastir | 2024/07/31 09:40 | Shinji Hazawa v Mousa Alkotop | 6-3,6-7,7-6 |