Round: 60 Ground: Hardcourt outdoor
| USA F26, Singles Qualifying | 2015/09/12 17:00 | Ellen, Keanu v Cozbinov, Alexander | 3-6,1-6 |
| ITF Romania F9 | 2015/07/14 09:15 | Horansky, Filip v Cozbinov, Alexander | 6-1,6-4 |
| ITF Romania F9 | 2015/07/13 07:00 | Orno, Philip v Cozbinov, Alexander | 6-7,6-1,3-6 |
| ITF Romania F8 Qual | 2015/07/06 06:30 | Cozbinov, Alexander v Khaledan, Shahin | 5-7,1-6 |
| ITF Romania F8 Qual | 2015/07/05 07:00 | Mircea-Alexandru Jecan v Cozbinov, Alexander | 1-6,6-1,3-6 |
| ITF Romania F8 Qual | 2015/07/04 05:30 | Dan Alexandru Tomescu v Cozbinov, Alexander | 4-6,0-6 |
| ITF Romania F7 | 2015/06/29 07:30 | Garzelli, Francesco v Cozbinov, Alexander | 7-6,6-3 |
| ITF Romania F7 | 2015/06/28 07:00 | Cozbinov, Alexander v Filip, Vladimir | 6-7,6-0,6-1 |
| USA F26, Singles Qualifying | 2015/09/12 16:00 | Ren Nakamura v Ventre, Alessandro-Damiano | 3-6,6-7 |
| USA F26, Singles Qualifying | 2015/09/11 17:00 | Ren Nakamura v Keenan Mayo | 6-0,6-3 |
| ITF Canada F5 | 2015/07/22 19:25 | Aleksandar Vukic v Ren Nakamura | 6-4,6-2 |
| ITF Canada F4 Qual | 2015/06/29 19:30 | Ren Nakamura v Krustev, Victor | 6-2,6-1 |
| ITF Canada F3 | 2015/06/23 18:00 | Sarmiento, Raymond v Ren Nakamura | 5-7,4-6 |
| ITF Japan F5 | 2015/06/01 01:00 | Kishi, Ryota v Ren Nakamura | 6-3,6-4 |
| ITF China F6 | 2015/05/26 06:55 | Ren Nakamura v Gao, Xin | 1-6,1-6 |
| ITF China F6 Qual | 2015/05/25 02:00 | Ren Nakamura v Wang, Huixin | 7-6,6-1 |