Stadium: Court 5 Round: 26 Ground: Clay
| 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 Helsinki | 2021/05/31 07:00 | Krainer, L. v Burdet, Adrien | 5-7,3-6 |
| ITF M15 Kouvola | 2021/05/26 06:00 | Bega, Alessandro v Krainer, L. | 6-1,6-2 |
| ITF M15 Cairo | 2021/04/28 14:55 | Pinnington Jones, Jack v Krainer, L. | 7-6,2-6,6-3 |
| ITF M15 Cairo | 2021/08/04 07:30 | Gabriele Maria Noce v Constantin Bittoun Kouzmine | 0-6,6-3,4-6 |
| ITF M15 Cairo | 2021/08/03 07:30 | Constantin Bittoun Kouzmine v Thiago Cigarran | 6-1,4-6,10-8 |
| ITF M15 Cairo | 2021/08/02 08:30 | Constantin Bittoun Kouzmine v Tobias Franco | 6-2,6-0 |
| ITF M15 Cairo | 2021/08/01 09:00 | Constantin Bittoun Kouzmine v Edoardo Zanada | 6-3,4-6,10-8 |
| ITF M15 Cairo | 2021/07/26 08:00 | Constantin Bittoun Kouzmine v Samuele Pieri | 6-7,3-6 |
| ITF M15 Cairo | 2021/07/25 08:00 | Constantin Bittoun Kouzmine v El Sayed, Ashraf | 6-0,6-1 |
| ITF M15 Cairo | 2021/07/22 08:00 | Constantin Bittoun Kouzmine v Oleksandr Ovcharenko | 4-6,2-6 |
| ITF M15 Cairo | 2021/07/21 08:00 | Constantin Bittoun Kouzmine v Alhogbani, Ammar | 4-6,7-5,6-2 |