Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF M25 Decatur | 2021/08/04 18:25 | Kaichi Uchida v Karlis Ozolins | 4-6,4-6 |
| ITF M25 Champaign | 2021/07/28 16:45 | Christian Langmo v Karlis Ozolins | 7-6,6-1 |
| ITF M15 Monastir | 2021/05/06 10:05 | Mohamed Aziz Dougaz v Karlis Ozolins | 6-4,6-3 |
| ITF M15 Monastir | 2021/05/04 10:30 | Jabari Stafford v Karlis Ozolins | 1-6,1-6 |
| ITF M15 Monastir | 2021/04/27 08:30 | Karlis Ozolins v Oscar Jose Gutierrez | 4-6,2-6 |
| ITF M15 Monastir | 2021/04/20 09:00 | Karlis Ozolins v Viktor Jovic | 7-5,4-6,3-6 |
| ITF M15 Sharm El Sheikh | 2021/03/17 07:30 | Karlis Ozolins v Illya Beloborodko | 2-6,1-6 |
| ITF M15 Sharm El Sheikh | 2021/03/10 10:55 | Karlis Ozolins v Jacopo Berrettini | 1-6,4-6 |
| ITF M25 Decatur | 2021/08/04 13:50 | Shintaro Imai v Felix Corwin | 6-1,6-2 |
| ITF M25 Champaign | 2021/07/28 18:40 | Dane Sweeny v Shintaro Imai | 6-1,3-6,6-3 |
| ITF M25 Santo Domingo | 2021/06/09 12:55 | Shintaro Imai v Igor Marcondes | 6-7,4-6 |
| ITF M25 Santo Domingo | 2021/06/03 16:50 | Shintaro Imai v Christian Langmo | 7-6,5-7,5-7 |
| ITF M25 Santo Domingo | 2021/06/01 15:25 | Shintaro Imai v Evan Zhu | 6-3,6-3 |
| ITF M15 Monastir | 2021/05/04 09:00 | Alexander Donski v Shintaro Imai | 7-5,6-4 |
| ITF M15 Monastir | 2021/04/29 08:15 | Shintaro Imai v Benjamin Pietri | 6-7,4-6 |
| ITF M15 Monastir | 2021/04/22 10:00 | Shintaro Imai v Igor Marcondes | 3-6,1-6 |