| ITF Germany F8 Qual | 2015/07/19 08:30 | Julian Onken v Aliaksandr Prudnikau | 6-3,6-3 |
| ITF Germany F7 | 2015/07/15 09:00 | Leon Schutt v Julian Onken | 6-3,6-4 |
| ITF Germany F7 | 2015/07/13 08:00 | Leon Schutt v Julian Onken | 6-1,4-6,7-6 |
| ITF Germany F7 | 2015/07/13 08:00 | Jannik Rother v Julian Onken | 3-6,6-3,0-6 |
| ITF Germany F7 | 2015/07/12 08:00 | Egill Sigurdsson v Julian Onken | 1-6,1-6 |
| ITF Germany F4 | 2015/01/26 11:30 | Sander Arends v Julian Onken | 6-1,6-3 |
| ITF Germany F16 | 2014/10/12 07:30 | Julian Onken v Tomas Charlos | 2-6,6-4,6-3 |
| ITF Germany F7 | 2014/07/06 08:30 | Soren Hess-Olesen v Julian Onken | 6-4,6-0 |
| ITF Austria F4 | 2015/07/14 09:00 | Goncalo Oliveira v Maximilian Neuchrist | 5-7,3-6 |
| ITF Austria F4 Qual | 2015/07/12 09:00 | Goncalo Oliveira v Joy Vigani | 6-4,6-2 |
| ITF Austria F4 Qual | 2015/07/11 07:15 | Goncalo Oliveira v Lorenzo Di Maro | 6-2,6-2 |
| ITF Austria F3 | 2015/07/07 09:00 | Goncalo Oliveira v Tomislav Ternar | 6-4,4-6,6-7 |
| ITF Austria F3 | 2015/07/05 08:00 | Goncalo Oliveira v Hannes Wagner | 3-6,1-6 |
| ITF Austria F2 | 2015/06/29 14:30 | Isak Arvidsson v Goncalo Oliveira | 6-2,6-3 |
| ITF Austria F1 | 2015/06/24 11:15 | Andrea Basso v Goncalo Oliveira | 6-7,6-3,6-1 |
| ITF Austria F1 | 2015/06/23 13:20 | Eduardo Dischinger v Goncalo Oliveira | 2-6,4-6 |