| UTR Pro Newport Beach | 2024/05/20 18:00 | Alex Knaff v Alessandro-D Ventre | 6-3,6-3 |
| ITF M25 Nottingham | 2024/05/01 09:00 | Alex Knaff v Charles Broom | 6-3,4-6,3-6 |
| ITF M25 Nottingham | 2024/04/24 10:40 | Paul Jubb v Alex Knaff | 6-4,7-6 |
| ITF M15 Monastir | 2024/04/19 08:30 | Eliakim Coulibaly v Alex Knaff | 7-6,4-6,7-5 |
| ITF M15 Monastir | 2024/04/18 08:30 | Grigory Shebekin v Alex Knaff | 4-6,3-6 |
| ITF M15 Monastir | 2024/04/17 15:15 | Menelaos Efstathiou v Alex Knaff | 1-6,3-6 |
| ITF M15 Monastir | 2024/04/12 10:30 | Giles Hussey v Alex Knaff | 6-0,7-6 |
| ITF M15 Monastir | 2024/04/11 08:30 | Louay Makke v Alex Knaff | 1-6,2-6 |
| UTR Pro Newport Beach | 2024/05/20 19:30 | Hiroki Sakagawa v Yassine Smiej | 6-1,6-2 |
| ITF M25 Calabasas | 2024/03/20 16:55 | Nishesh Basavareddy v Hiroki Sakagawa | 6-1,6-2 |
| ITF M25 Calabasas | 2024/03/19 17:00 | Hiroki Sakagawa v Lodewijk Weststrate | 6-2,6-3 |
| ITF M15 Yanagawa | 2023/12/26 00:30 | Hiroki Sakagawa v Shunsuke Nakagawa | 5-7,4-6 |
| ITF M15 Yanagawa | 2023/12/25 00:30 | Yuichiro Inui v Hiroki Sakagawa | 3-6,3-6 |
| ITF M15 Yanagawa | 2023/12/20 02:30 | Hiroki Sakagawa v Ryotaro Matsumura | 2-6,1-6 |
| ITF M15 Yanagawa | 2023/12/18 01:00 | Kenta Miyoshi v Hiroki Sakagawa | 4-6,6-2,9-11 |
| ITF M25 Sapporo | 2023/09/11 01:00 | Woobin Shin v Hiroki Sakagawa | 0-6,6-3,10-7 |