Stadium: Court 6 Round: 44 Ground: Clay
| Challenger Como | 2021/08/29 14:45 | Gabriele Piraino v Franco Agamenone | 2-6,2-6 |
| Challenger Barletta | 2021/08/23 11:00 | Andrea Vavassori v Gabriele Piraino | 6-2,5-7,6-3 |
| Challenger Barletta | 2021/08/22 14:45 | Gabriele Piraino v Alvaro Lopez San Martin | 7-6,3-6,7-5 |
| ITF M15 Pescara | 2021/08/17 10:25 | Gabriele Piraino v Alexis Musialek | 4-6,2-6 |
| Challenger Cordenons | 2021/08/02 11:55 | Alejandro Gonzalez v Gabriele Piraino | 6-3,6-2 |
| Challenger Cordenons | 2021/08/01 11:25 | Gabriele Piraino v Julian Ocleppo | 6-3,6-3 |
| ITF M15 Perugia | 2021/07/24 14:55 | Andrea Basso v Gabriele Piraino | 6-2,6-1 |
| ITF M15 Perugia | 2021/07/23 12:00 | Alessandro Pecci v Gabriele Piraino | 7-6,6-7,1-6 |
| 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 Santa Margherita | 2019/09/18 15:40 | Horst Rieder v Riccardo Di Nocera | 3-6,7-5,4-6 |
| ITF M25 Santa Margherita | 2019/09/17 12:00 | Marcel Marlon Sudzum v Horst Rieder | 0-6,0-6 |
| ITF M25 Santa Margherita | 2019/09/13 11:00 | Horst Rieder v Wilson Leite | 1-6,1-6 |
| ITF M25 Santa Margherita | 2019/09/11 13:30 | Giorgio Portaluri v Horst Rieder | 3-6,4-6 |