Stadium: Court 3 Round: 54 Ground: Clay
| ITF M25 Velenje | 2021/07/06 12:55 | Daniel Dutra Da Silva v Maj Premzl | 6-2,7-5 |
| ITF M15 Ostrava | 2021/11/24 11:00 | Ondrej Krstev v Mark Havlicek | 5-7,7-5,3-6 |
| ITF M15 Ostrava | 2021/11/22 11:00 | Ondrej Krstev v Llewelyn Bevan | 6-3,5-7,10-6 |
| ITF M15 Opava | 2021/11/18 09:00 | Ondrej Krstev v Lukas Pokorny | 7-6,4-6,4-6 |
| ITF M15 Opava | 2021/11/17 09:00 | Ondrej Krstev v Kristof Minarik | 6-4,7-5 |
| ITF M25 Prague | 2021/10/05 12:45 | Jakub Paul v Ondrej Krstev | 7-5,6-4 |
| ITF M15 Trnava | 2020/02/26 10:20 | Ondrej Krstev v Aldin Setkic | 6-3,6-7,2-6 |
| ITF M15 Oberhaching | 2020/02/20 13:15 | Ondrej Krstev v Elmar Ejupovic | 6-3,2-6,3-6 |
| ITF M15 Oberhaching | 2020/02/19 12:45 | Mirko Martinez v Ondrej Krstev | 6-0,6-7,4-6 |