| ITF Italy F25 Qual | 2017/08/05 12:00 | Augusto Virgili v Jonas Greif | 6-3,6-1 |
| ITF Italy F23 Qual | 2016/07/30 07:30 | Alexander Weis v Jonas Greif | 6-1,6-0 |
| ITF Croatia F3 | 2018/03/20 09:00 | Tom Kocevar-Desman v Horst Rieder | 6-2,6-1 |
| ITF Croatia F3 | 2018/03/18 08:00 | Mateo Bubalo v Horst Rieder | 3-6,2-6 |
| ITF Italy F3 Qual | 2018/03/12 19:30 | Tommaso Gabrieli v Horst Rieder | 7-5,7-5 |
| ITF Italy F2 | 2018/03/08 12:30 | Horst Rieder v Lorenzo Giustino | 3-6,0-6 |
| ITF Turkey F46 Qual | 2017/12/02 06:45 | Egor Matvievici v Horst Rieder | 6-2,3-6,6-4 |
| ITF Turkey F44 | 2017/11/20 07:15 | Horst Rieder v Jan Zednik | 6-7,2-6 |
| ITF Turkey F44 | 2017/11/19 07:15 | Horst Rieder v Preston Connor | 6-1,6-2 |
| ITF Turkey F43 | 2017/11/12 07:15 | Horst Rieder v Liang-Yu Lin | 4-6,4-6 |