Stadium: Court 1 Round: 25 Ground: Clay
| ITF - M15 Bad Waltersdorf | 2021/08/29 09:35 | Timo Stodder v Lukas Krainer | 6-3,6-2 |
| ITF - M15 Bad Waltersdorf | 2021/08/28 08:00 | Gabriel Decamps v Lukas Krainer | 2-6,3-6 |
| ITF - M15 Bad Waltersdorf | 2021/08/27 09:25 | Lukas Krainer v Neil Oberleitner | 6-7,6-4,6-0 |
| ITF - M15 Bad Waltersdorf | 2021/08/26 09:35 | Tomas Lipovsek Puches v Lukas Krainer | 3-6,4-6 |
| ITF - M15 Bad Waltersdorf | 2021/08/25 08:50 | Lukas Krainer v Admir Kalender | 6-4,3-6,6-2 |
| ITF - M15 Warmbad-Villach | 2021/08/20 12:50 | Gabriel Decamps v Lukas Krainer | 6-2,6-3 |
| ITF - M15 Warmbad-Villach | 2021/08/19 09:55 | Lukas Krainer v Tom Kocevar-Desman | 6-3,7-5 |
| ITF - M15 Warmbad-Villach | 2021/08/18 14:35 | Mario G Fernandez v Lukas Krainer | 6-7,6-2,1-6 |
| ITF - M15 Bad Waltersdorf | 2021/08/24 07:00 | Hans Peter Kaufmann v Fermin Tenti | 6-3,1-6,1-6 |
| ITF - M15 Monastir | 2021/05/23 09:30 | Luka Vukovic v Hans Peter Kaufmann | 6-1,6-3 |
| ITF - M15 Monastir | 2021/05/17 09:00 | Arthur Bouquier v Hans Peter Kaufmann | 6-1,6-3 |
| ITF - M15 Cairo | 2021/04/26 12:30 | Hans Peter Kaufmann v Constant De La Bassetiere | 2-6,4-6 |
| ITF - M15 Cairo | 2021/04/25 07:30 | Hans Peter Kaufmann v Ali Alshati | 7-6,6-2 |
| ITF - M15 Cairo | 2021/04/20 10:05 | Hans Peter Kaufmann v Santiago De La Fuente | 0-6,4-6 |
| ITF - M15 Cairo | 2021/04/18 18:30 | Mohab Hamed v Hans Peter Kaufmann | 3-6,1-6 |
| ITF - M15 Cairo | 2021/04/12 08:30 | Yanais Laurent v Hans Peter Kaufmann | 6-2,6-1 |