Ground: Hardcourt outdoor
| UTR Pro Newport Beach | 2024/05/22 19:30 | Alex Knaff v Collin Altamirano | 5-7,7-6,4-6 |
| UTR Pro Newport Beach | 2024/05/21 18:00 | Alessandro-D Ventre v Collin Altamirano | 5-7,4-6 |
| ITF M25 Anapoima | 2024/04/30 16:30 | Collin Altamirano v Alberto Odiseo Alvarado Berrospi | 6-2,6-2 |
| ITF M25 Mosquera | 2024/04/23 16:55 | Collin Altamirano v Ivan Denisov | 4-6,6-3,4-6 |
| Challenger San Miguel de Tucuman | 2024/04/14 15:45 | Collin Altamirano v Juan Sebastian Osorio | 6-7,6-3,2-6 |
| ITF M15 Quillota | 2024/04/11 13:30 | Juan Estevez v Collin Altamirano | 4-6,6-4,6-2 |
| ITF M15 Quillota | 2024/04/10 13:30 | Oren Vasser v Collin Altamirano | 2-6,1-6 |
| ITF M25 Calabasas | 2024/03/20 19:35 | Collin Altamirano v Bor Artnak | 3-6,6-7 |
| UTR Pro Newport Beach | 2024/05/21 18:00 | Alex Knaff v Hiroki Sakagawa | 7-5,6-3 |
| 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 |