| ITF M25 Budapest | 2021/09/27 14:25 | Mark Havlicek v Horst Rieder | 6-4,6-2 |
| ITF M15 Vyshkovo | 2021/09/20 07:00 | Horst Rieder v Danylo Veremeychuk | 6-2,1-6,5-10 |
| ITF M15 Vyshkovo | 2021/09/20 06:00 | Horst Rieder v Oleksiy Kalynyuk | 6-3,6-0 |
| ITF M15 Ulcinj | 2021/09/06 07:30 | Gabriele Piraino v Horst Rieder | 7-6,6-1 |
| ITF M15 Ulcinj | 2021/08/29 12:30 | Lautaro Agustin Falabella v Horst Rieder | 6-3,2-6,10-7 |
| ITF M25 Bolzano | 2021/08/02 14:25 | Horst Rieder v Dominique Graf | 6-7,3-6 |
| ITF M25 Bolzano | 2021/08/01 07:30 | Horst Rieder v Gabriele Camilli | 6-1,7-6 |
| ITF M25 Ricany | 2019/09/22 09:00 | Michael Paty v Horst Rieder | 2-6,4-6 |
| ITF M25 Klosters | 2022/06/19 13:40 | Edison Ambarzumjan v Filippo Speziali | 2-6,2-6 |
| UTR Pro Tennis Series Slovenia | 2022/06/11 06:00 | Edison Ambarzumjan v Nicholas Campbell | 5-7,2-6 |
| UTR Pro Tennis Series Slovenia | 2022/06/10 09:58 | Edison Ambarzumjan v Juan Pablo Paz | 2-6,1-6 |
| UTR Pro Tennis Series Slovenia | 2022/06/08 08:30 | Edison Ambarzumjan v Arthus De La Bassetiere | 3-6,2-5 |
| UTR Pro Tennis Series Slovenia | 2022/06/07 09:00 | Edison Ambarzumjan v Christos Keisidis | 1-6,2-6 |
| UTR Pro Tennis Series Slovenia | 2022/06/06 10:30 | Maxence Broville v Edison Ambarzumjan | 4-6,6-3,6-6 |
| ITF M15 Dubrovnik | 2022/04/06 09:25 | Bogdan Ionut Apostol v Edison Ambarzumjan | 6-3,7-6 |
| ITF M15 Dubrovnik | 2022/04/05 09:30 | Radomir Tomic v Edison Ambarzumjan | 6-4,2-6,10-12 |