Stadium: Court 1 Round: 26 Ground: Hardcourt indoor
| ITF M15 East Lansing | 2021/11/16 18:00 | Sarmiento, Raymond v Zemel, Yankel | 6-3,6-4 |
| ITF - M25 Calabasas | 2021/10/27 17:00 | Sarmiento, Raymond v Farren, Connor | 6-7,6-7 |
| UTR Pro Tennis Series California | 2021/08/29 18:00 | Tristan Boyer v Sarmiento, Raymond | 6-3,6-4 |
| UTR Pro Tennis Series California | 2021/08/28 18:00 | Kyle Kang v Sarmiento, Raymond | 6-7,4-6 |
| UTR Pro Tennis Series California | 2021/08/27 19:30 | Sema Pankin v Sarmiento, Raymond | 4-6,3-6 |
| UTR Pro Tennis Series California | 2021/08/24 19:30 | Kris Van Wyk v Sarmiento, Raymond | 4-6,1-6 |
| UTR Pro Tennis Series California | 2021/08/23 15:00 | Demulling, Wyatt v Sarmiento, Raymond | 1-6,3-6 |
| UTR Pro Tennis Series California | 2021/08/22 18:00 | Ventre, Alessandro-Damiano v Sarmiento, Raymond | 3-6,3-6 |
| ITF M15 East Lansing | 2021/11/17 17:55 | Peck, Joshua v Mitsui, Shunsuke | 6-0,4-6,5-7 |
| ITF M15 East Lansing | 2021/11/16 15:00 | Mitsui, Shunsuke v Adit Sinha | 6-2,6-4 |
| ITF - M15 Monastir | 2021/05/11 11:30 | Mitsui, Shunsuke v Beale, Jeremy | 6-7,6-4,2-6 |
| ITF - M15 Monastir | 2021/05/02 08:00 | Mitsui, Shunsuke v Yuta Kikuchi | 1-6,2-6 |
| ITF - M15 Monastir | 2021/04/26 09:00 | Zachary Svajda v Mitsui, Shunsuke | 6-1,7-6 |
| ITF - M15 Antalya | 2021/04/23 09:05 | Forti, Francesco v Mitsui, Shunsuke | 4-6,6-3,6-3 |
| ITF - M15 Antalya | 2021/04/22 10:15 | Mitsui, Shunsuke v Bogdan Bobrov | 1-6,7-6,6-0 |
| ITF - M15 Antalya | 2021/04/20 10:35 | Sendogan, Emir v Mitsui, Shunsuke | 2-6,6-3,4-6 |