Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF M15 South Bend | 2023/06/22 17:35 | Strong Kirchheimer v Karlis Ozolins | 6-7,7-6,6-4 |
| ITF M15 South Bend | 2023/06/21 15:00 | John Chin v Karlis Ozolins | 1-6,3-6 |
| Davis Cup | 2023/02/05 13:35 | Karlis Ozolins v Daniel Cukierman | 7-6,2-6,4-6 |
| Davis Cup | 2023/02/04 10:00 | Karlis Ozolins v Edan Leshem | 6-0,6-3 |
| ITF M25 Malibu | 2023/01/06 18:00 | Karlis Ozolins v Strong Kirchheimer | 6-3,4-6,5-10 |
| ITF M25 Malibu | 2023/01/03 19:30 | Jacob Brumm v Karlis Ozolins | 3-6,1-6 |
| ITF M25 Malibu | 2023/01/02 17:00 | Maxwell McKennon v Karlis Ozolins | 3-6,4-6 |
| Challenger Champaign | 2022/11/15 20:50 | Karlis Ozolins v Ben Shelton | 3-6,4-6 |
| ITF M25 Pensacola | 2023/05/18 18:55 | Naoki Nakagawa v Sekou Bangoura | 4-6,4-6 |
| ITF M25 Pensacola | 2023/05/17 16:15 | Naoki Nakagawa v Justin Lyons | 6-2,6-3 |
| Challenger Coquimbo | 2023/05/01 19:35 | Naoki Nakagawa v Pedro Boscardin Dias | 6-4,5-7,3-6 |
| Challenger Buenos Aires | 2023/04/23 13:00 | Naoki Nakagawa v Tomas Farjat | 1-6,6-4,6-7 |
| Challenger Morelos | 2023/04/18 16:30 | Naoki Nakagawa v Denis Yevseyev | 6-7,6-4,2-6 |
| Challenger Morelos | 2023/04/17 19:35 | Aidan Mchugh v Naoki Nakagawa | 3-6,3-6 |
| Challenger Morelos | 2023/04/16 19:15 | Luciano Doria v Naoki Nakagawa | 3-6,4-6 |
| Challenger Leon | 2023/04/09 21:45 | Naoki Nakagawa v Mark Lajal | 6-7,2-6 |