Stadium: Court 3 Round: 44 Ground: Carpet indoor
| ITF Germany F2 Qual | 2018/01/21 08:30 | Heger, Tim v Boulais, Justin | 6-7,7-5,6-1 |
| ITF Germany F1 | 2018/01/07 11:30 | Heger, Tim v Kai Lemstra | 4-6,4-6 |
| ITF Germany F1 | 2018/01/07 08:00 | Erwin Troebinger v Heger, Tim | 3-6,4-6 |
| ITF Germany F12 | 2017/08/22 09:20 | Walder, Jordi v Heger, Tim | 6-3,6-4 |
| ITF Germany F11 | 2017/08/15 10:30 | Heger, Tim v Peter Heller | 1-6,4-6 |
| ITF Germany F3 | 2017/01/24 10:00 | Alexey Vatutin v Heger, Tim | 6-3,6-1 |
| ITF Germany F17 | 2016/10/31 09:00 | Veldheer, Mick v Heger, Tim | 6-0,6-3 |
| ITF Germany F17 | 2016/10/30 11:00 | Albuszies, Niklas v Heger, Tim | 6-7,6-2,5-7 |
| ITF Germany F1 | 2018/01/08 09:00 | Chang, Jonathan v Aichhorn, Jakob | 2-6,3-6 |
| ITF Dominican Republic F1 | 2017/11/27 13:00 | Chang, Jonathan v Greif, Lukas | 6-3,4-6,0-6 |
| ITF USA F37 | 2017/11/17 18:15 | Chang, Jonathan v Nuno Borges | 2-6,2-6 |
| ITF USA F37 | 2017/11/16 16:00 | Harrison Adams v Chang, Jonathan | 0-6,3-6 |
| ITF USA F37 | 2017/11/14 17:50 | Nick Chappell v Chang, Jonathan | 6-3,4-6,3-6 |
| ITF USA F36 | 2017/11/04 16:30 | Chang, Jonathan v Paul Jubb | 5-7,2-6 |
| ITF USA F36 | 2017/11/03 17:30 | Noah Schachter v Chang, Jonathan | 4-6,2-6 |
| ITF USA F35 | 2017/10/29 16:00 | Chang, Jonathan v Belov, Sergey | 3-6,2-6 |