Round: 44 Ground: Hardcourt indoor
| ITF USA F38 | 2017/11/19 16:30 | Terry, Matthew v Lagaev, Nick | 7-6,6-1 |
| ITF Canada F7 Qual | 2017/09/09 17:00 | Grunberger, Daniel v Lagaev, Nick | 3-6,7-5,6-4 |
| ITF Canada F6 Qual | 2017/09/02 21:00 | Lagaev, Nick v Ore, I. A. | 3-6,3-6 |
| ITF Canada F6 Qual | 2017/09/02 17:30 | Tiraspolsky, Ilya v Lagaev, Nick | 1-6,2-6 |
| ITF USA F20 | 2017/06/17 19:00 | Lagaev, Nick v Gervais, Washi | 4-6,2-6 |
| ITF Canada F2 Qual | 2017/03/05 14:30 | Aragone, JC v Lagaev, Nick | 6-3,6-2 |
| ITF Canada F2 Qual | 2017/03/04 17:30 | Lagaev, Nick v Beddow, Samuel | 6-1,6-1 |