Stadium: Court 1 Round: 25 Ground: Clay
| ITF - M15 Bratislava | 2021/08/25 08:00 | Karlis Ozolins v Edoardo Lavagno | 0-6,6-0,4-6 |
| ITF - M15 Lodz | 2021/08/17 08:00 | Karlis Ozolins v Markus Eriksson | 6-7,6-1,2-6 |
| ITF - M25 Decatur | 2021/08/06 15:00 | Karlis Ozolins v Paul Jubb | 1-6,6-1,6-7 |
| ITF - M25 Decatur | 2021/08/05 14:50 | Karlis Ozolins v Shintaro Imai | 7-6,3-6,7-6 |
| 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 Bratislava | 2021/08/24 10:00 | Biagio Gramaticopolo v Francesco Vilardo | 6-4,7-6 |
| ITF - M15 Pescara | 2021/08/18 14:00 | Tomas Lipovsek Puches v Francesco Vilardo | 7-6,6-4 |
| ITF - M25 Pitesti | 2021/08/04 10:55 | Valentin Royer v Francesco Vilardo | 6-0,6-4 |
| UTR - Pro Tennis Series - Mulheim | 2021/07/30 12:32 | Billy Harris v Francesco Vilardo | 6-3,6-4 |
| UTR - Pro Tennis Series - Mulheim | 2021/07/30 07:00 | Francesco Vilardo v Alexander Hoogmartens | 1-6,2-5 |
| UTR - Pro Tennis Series - Mulheim | 2021/07/29 10:00 | Francesco Vilardo v Hazem Naw | 6-2,6-1 |
| UTR - Pro Tennis Series - Mulheim | 2021/07/28 11:00 | Jim Hendrikx v Francesco Vilardo | 6-7,3-6 |
| UTR - Pro Tennis Series - Mulheim | 2021/07/27 08:00 | Stefan Peter Hampe v Francesco Vilardo | 2-6,4-6 |