Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| ITF - Monastir M15 | 2021/04/20 09:00 | Karlis Ozolins v Viktor Jovic | 7-5,4-6,3-6 |
| ITF - Sharm El Sheikh M15 | 2021/03/17 07:30 | Karlis Ozolins v Illya Beloborodko | 2-6,1-6 |
| ITF - Sharm El Sheikh M15 | 2021/03/10 10:55 | Karlis Ozolins v Jacopo Berrettini | 1-6,4-6 |
| ITF - St Petersburg M15 | 2021/02/09 11:15 | Karlis Ozolins v Konstantin Kravchuk | 4-6,3-6 |
| ITF - St Petersburg M15 | 2021/02/04 07:00 | Alexey Zakharov v Karlis Ozolins | 4-6,6-2,7-6 |
| ITF - St Petersburg M15 | 2021/02/02 11:30 | Karlis Ozolins v Daniil Golubev | 6-3,6-1 |
| ITF - Manacor M15 | 2021/01/13 08:55 | Jules Okala v Karlis Ozolins | 3-6,6-4,6-1 |
| ITF - Manacor M15 | 2021/01/09 19:35 | Evan Furness v Karlis Ozolins | 6-2,6-4 |
| ITF - Monastir M15 | 2021/04/24 09:30 | Igor Marcondes v Oscar Jose Gutierrez | 6-4,7-5 |
| ITF - Monastir M15 | 2021/04/23 14:00 | Oscar Jose Gutierrez v Jonathan Mridha | 6-4,6-3 |
| ITF - Monastir M15 | 2021/04/22 08:30 | Oscar Jose Gutierrez v Viktor Jovic | 6-2,6-3 |
| ITF - Monastir M15 | 2021/04/21 10:20 | Oscar Jose Gutierrez v Benjamin Pietri | 6-3,6-2 |
| ITF - Sharm El Sheikh M15 | 2021/03/31 13:25 | Oscar Jose Gutierrez v Ryan Nijboer | 7-6,2-6,3-6 |
| ITF - Sharm El Sheikh M15 | 2021/03/26 07:30 | Oscar Jose Gutierrez v Marcello Serafini | 4-6,4-6 |
| ITF - Sharm El Sheikh M15 | 2021/03/25 07:30 | Oscar Jose Gutierrez v Samuel Vincent Ruggeri | 6-0,3-6,6-2 |
| ITF - Sharm El Sheikh M15 | 2021/03/24 11:55 | Oscar Jose Gutierrez v Karlo Cubelic | 4-6,6-3,7-6 |