| 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 Austria F4 Qual | 2018/07/22 08:00 | Yvo Panak v Horst Rieder | 6-2,6-0 |
| ITF Austria F4 Qual | 2018/07/21 10:00 | Carlos Kelaidis v Horst Rieder | 3-6,6-3,3-6 |
| ITF Italy F19 | 2018/07/14 08:30 | Andrea Grazioso v Horst Rieder | 6-4,6-1 |
| ITF Austria F2 | 2018/07/07 08:00 | Horst Rieder v Alexey Aleshchev | 2-6,0-6 |
| ITF Austria F2 | 2018/07/07 07:15 | Bjorn Nareyka v Horst Rieder | 2-6,4-6 |
| ITF Turkey F19 | 2018/05/15 08:20 | Horst Rieder v Francois-Arthur Vibert | 4-6,1-6 |
| ITF Turkey F19 Qual | 2018/05/14 07:30 | Joel Cannell v Horst Rieder | 4-6,7-6,6-4 |
| ITF Turkey F19 Qual | 2018/05/13 07:30 | Dmytro Ishtuganov v Horst Rieder | 5-7,1-6 |