Round: 62 Ground: Clay
| ITF Romania F5 | 2017/06/24 14:00 | Ontica, Cosmin v Dina, George Iulian | 6-0,6-2 |
| ITF Romania F4 | 2017/05/15 07:00 | Ross, Gianni v Ontica, Cosmin | 6-3,6-4 |
| Turkey F17, Singles Qualifying | 2017/04/29 07:00 | Ontica, Cosmin v Jhun, Alexander | 1-6,4-6 |
| Turkey F16, Singles Qualifying | 2017/04/23 07:00 | Ontica, Cosmin v Nunez, V. | 1-6,5-7 |
| ITF Greece F3 | 2017/03/18 09:30 | Bothwell, Peter v Ontica, Cosmin | 4-6,6-3,6-3 |
| ITF Greece F2 Qual | 2017/03/14 07:30 | Conkic, Petar v Ontica, Cosmin | 6-2,6-1 |
| ITF Turkey F5 | 2017/02/05 07:00 | Ontica, Cosmin v Boyer, Dusty H | 1-6,3-6 |
| ITF Turkey F5 | 2017/02/04 06:30 | Hovhannisyan, Mousheg v Ontica, Cosmin | 2-6,2-6 |
| ITF Romania F5 | 2017/06/24 14:00 | Ghasemi, Kooros v Apostol, Bogdan Ionut | 1-6,2-6 |
| ITF Romania F4 | 2017/06/23 08:00 | Apostol, Bogdan Ionut v Michiel de Krom | 4-6,2-6 |
| ITF Romania F4 | 2017/06/22 08:00 | Madaras, Dragos Nicolae v Apostol, Bogdan Ionut | 1-6,7-5,0-6 |
| ITF Romania F4 | 2017/06/21 07:00 | Apostol, Bogdan Ionut v Addison, Aaron | 5-7,7-6,6-3 |
| ITF Romania F4 | 2017/06/20 07:00 | Apostol, Bogdan Ionut v Krivokuca, Neven | 7-5,6-1 |
| ITF Romania F4 | 2017/06/19 10:00 | Kristjan Tamm v Apostol, Bogdan Ionut | 4-6,2-6 |
| ITF Romania F3 | 2017/06/14 10:15 | Apostol, Bogdan Ionut v Bensoussan, Samuel | 3-6,6-7 |
| ITF Romania F3 | 2017/06/12 07:00 | Ignat, Dragos Constantin v Apostol, Bogdan Ionut | 2-6,1-6 |