Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF M15 St Petersburg | 2021/02/09 11:15 | Ozolins, Karlis v Kravchuk, Konstantin | 4-6,3-6 |
| ITF M15 St Petersburg | 2021/02/04 07:00 | Alexey Zakharov v Ozolins, Karlis | 4-6,6-2,7-6 |
| ITF M15 St Petersburg | 2021/02/02 11:30 | Ozolins, Karlis v Daniil Golubev | 6-3,6-1 |
| ITF - M15 Manacor | 2021/01/13 08:55 | Okala, Jules v Ozolins, Karlis | 3-6,6-4,6-1 |
| ITF - M15 Manacor | 2021/01/09 19:35 | Evan Furness v Ozolins, Karlis | 6-2,6-4 |
| ITF - M15 Manacor | 2021/01/05 13:50 | Ozolins, Karlis v Arthur Reymond | 6-4,6-3 |
| ITF M15 Parnu | 2020/11/05 12:00 | Ozolins, Karlis v Simon Freund | 4-6,2-6 |
| ITF M15 Parnu | 2020/11/04 12:45 | Zopp, Jurgen v Ozolins, Karlis | 6-3,3-6,4-6 |
| ITF - M15 Sharm El Sheikh | 2021/03/03 09:15 | Shintaro Imai v Jacopo Berrettini | 7-5,6-3 |
| ITF - M15 Antalya | 2021/02/11 08:45 | Jacopo Berrettini v Federico Arnaboldi | 3-6,2-6 |
| ITF - M15 Antalya | 2021/02/09 13:15 | Vanneste, Jeroen v Jacopo Berrettini | 7-6,3-6,3-6 |
| ITF - M15 Antalya | 2021/02/09 12:40 | Vanneste, Jeroen v Jacopo Berrettini | 7-6,3-6,3-6 |
| ITF - M15 Antalya | 2021/02/06 07:00 | Nuno Borges v Jacopo Berrettini | 6-3,6-0 |
| ITF - M15 Antalya | 2021/02/05 07:00 | Cezar Cretu v Jacopo Berrettini | 4-6,6-7 |
| ITF - M15 Antalya | 2021/02/04 11:15 | Jacopo Berrettini v Eriksson, Markus | 6-3,6-1 |
| ITF - M15 Antalya | 2021/02/04 06:20 | Kiyamov, Timur v Jacopo Berrettini | 3-6,6-4,5-7 |