| Turkey F14, Singles Qualifying | 2017/04/13 08:30 | Marsel Ilhan v Onken, Julian | 4-6,6-1,6-0 |
| Turkey F14, Singles Qualifying | 2017/04/11 07:30 | Navarro, Simon v Onken, Julian | 2-6,7-6,2-6 |
| ITF Croatia F4 | 2017/03/28 12:00 | Onken, Julian v Martin, Andrej | 4-6,7-6,1-6 |
| ITF Croatia F3 | 2017/03/21 09:00 | Jurij Rodionov v Onken, Julian | 2-6,7-6,6-1 |
| ITF Croatia F2 | 2017/03/16 12:05 | Riba, Pere v Onken, Julian | 6-1,6-2 |
| ITF Croatia F2 | 2017/03/15 09:00 | Onken, Julian v Mylokostov, Denys | 6-4,7-5 |
| ITF Croatia F2 | 2017/03/13 10:00 | Onken, Julian v Marco Miceli | 6-3,6-2 |
| ITF Croatia F2 | 2017/03/12 13:45 | Onken, Julian v Vachtl, Jiri | 6-1,6-0 |
| Turkey F15, Singles Qualifying | 2017/04/17 07:30 | Cem Ilkel v Markovic, Goran | 6-4,6-4 |
| Turkey F15, Singles Qualifying | 2017/04/16 12:30 | Cem Ilkel v Fermin Tenti | 6-2,6-2 |
| Turkey F15, Singles Qualifying | 2017/04/15 07:00 | Cem Ilkel v Tiainen, Jussi | 7-6,6-0 |
| Coupe Davis | 2017/04/07 10:30 | Cem Ilkel v Elias Ymer | 6-4,3-6,7-6,6-7,3-6 |
| Turkey F12, Singles Qualifying | 2017/03/29 08:30 | Alexander Vasilenko v Cem Ilkel | 6-4,6-3 |
| ITF Turkey F11 | 2017/03/26 07:30 | Netuschil, Marvin v Cem Ilkel | 5-7,7-5,6-1 |
| ITF Turkey F11 | 2017/03/25 07:30 | Nedelko, Ivan v Cem Ilkel | 6-7,3-6 |
| ITF Turkey F11 | 2017/03/24 08:00 | Mariano Kestelboim v Cem Ilkel | 4-6,3-6 |