Stadium: Court 09 Round: 26 Ground: Clay
| ITF M15 Warmbad-Villach | 2021/08/18 14:35 | Mario G Fernandez v Krainer, L. | 6-7,6-2,1-6 |
| ITF M15 Cairo | 2021/08/06 09:55 | Krainer, L. v Quentin Folliot | 4-6,1-6 |
| ITF M15 Cairo | 2021/08/05 09:20 | Krainer, L. v Constantin Bittoun Kouzmine | 6-1,6-2 |
| ITF M15 Cairo | 2021/08/04 09:10 | Karim-Mohamed Maamoun v Krainer, L. | 1-6,2-6 |
| ITF M15 Cairo | 2021/07/29 08:00 | Perchicot, Mathieu v Krainer, L. | 7-6,5-7,6-1 |
| ITF M15 Cairo | 2021/07/28 09:40 | Krainer, L. v Saud Alhogbani | 6-3,6-1 |
| ITF - M15 Monastir | 2021/07/13 09:30 | Beale, Jeremy v Krainer, L. | 6-3,6-3 |
| ITF - M15 Monastir | 2021/07/06 08:00 | Krainer, L. v El Midhawy, Adam | 1-6,4-6 |
| ITF M15 Warmbad-Villach | 2021/08/18 08:00 | Hajek, Petr v Kocevar-Desman, Tom | 4-6,7-5,4-6 |
| ITF M25 Velenje | 2021/07/07 08:00 | Kocevar-Desman, Tom v Zukas, Matias | 5-7,0-6 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/21 10:45 | Kocevar-Desman, Tom v Kawakami, Rimpei | 4-6,1-6 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/20 11:00 | Nikita Mashtakov v Kocevar-Desman, Tom | 5-7,4-6 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/19 14:25 | Kocevar-Desman, Tom v Jaimee Floyd Angele | 6-3,7-6 |
| ITF M15 Troisdorf | 2021/05/14 12:35 | Kocevar-Desman, Tom v Timo Stodder | 6-2,3-6,5-7 |
| ITF M15 Troisdorf | 2021/05/13 09:00 | Dan Added v Kocevar-Desman, Tom | 6-7,6-7 |
| ITF M15 Troisdorf | 2021/05/12 09:00 | Schmitz, Constantin v Kocevar-Desman, Tom | 6-4,4-6,3-6 |