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