Home History
| Germany F8, Singles | 2015/07/21 10:30 | Onken, Julian v Goncalo Oliveira | 6-4,6-1 |
| ITF Germany F8 Qual | 2015/07/19 08:30 | Onken, Julian v Prudnikau, Aliaksandr | 6-3,6-3 |
| ITF Germany F7 | 2015/07/15 09:00 | Schutt, Leon v Onken, Julian | 6-3,6-4 |
| ITF Germany F7 | 2015/07/13 08:00 | Schutt, Leon v Onken, Julian | 6-1,4-6,7-6 |
| ITF Germany F7 | 2015/07/13 08:00 | Rother, Jannik v Onken, Julian | 3-6,6-3,0-6 |
| ITF Germany F7 | 2015/07/12 08:00 | Sigurdsson, Egill v Onken, Julian | 1-6,1-6 |
| ITF Germany F4 | 2015/01/26 11:30 | Arends, Sander v Onken, Julian | 6-1,6-3 |
| ITF Germany F16 | 2014/10/12 07:30 | Onken, Julian v Charlos, Tomas | 2-6,6-4,6-3 |
Away History
| ITF Germany F7 | 2015/07/16 12:50 | Zaitcev, Anton v Jan Choinski | 3-6,6-3,6-2 |
| ITF Germany F7 | 2015/07/15 09:00 | Jan Choinski v Petersen, Bjoern | 6-4,6-4 |
| Challenger Marburg | 2015/06/30 09:00 | Jan Choinski v Cervantes, Inigo | 3-6,4-6 |
| ITF Belgium F3 | 2015/06/25 13:00 | Netuschil, Marvin v Jan Choinski | 6-4,6-4 |
| ITF Belgium F3 | 2015/06/24 08:00 | de Plaen, Nicolas v Jan Choinski | 2-6,1-6 |
| ITF Belgium F3 | 2015/06/23 08:00 | Meraut, Tristan v Jan Choinski | 2-6,2-6 |
| ITF Netherlands F1 | 2015/06/18 12:15 | Jan Choinski v Werner, Jean-Marc | 4-6,6-2,2-6 |
| ITF Netherlands F1 | 2015/06/17 09:00 | Jan Choinski v Veldheer, Mick | 6-0,6-4 |