Stadium: Court 5 Round: 44 Ground: Clay
| ITF M25 Prostejov | 2021/08/16 11:00 | Nino Stettner v Jiri Jenicek | 2-6,1-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/01 16:45 | Alexander Wolfschmidt v Nino Stettner | 5-7,7-6,10-6 |
| ITF M15 Monastir | 2021/06/27 09:00 | Nino Stettner v Kousuke Ogura | 2-6,2-6 |
| ITF M25 Prostejov | 2021/08/16 09:50 | Nico Hornitschek v Ondrej Valek | 6-1,6-2 |
| ITF M25 Prostejov | 2021/08/15 09:00 | Vojtech Vlkovsky v Ondrej Valek | 6-4,4-6,9-11 |
| ITF M25 Kottingbrunn | 2021/07/18 07:30 | Peter Goldsteiner v Ondrej Valek | 6-2,6-2 |
| ITF M15 Poprad | 2021/07/04 08:00 | Samuel Puskar v Ondrej Valek | 7-5,6-1 |
| ITF M25 Most | 2021/05/25 08:00 | Ondrej Valek v Sean Cuenin | 2-6,2-6 |
| ITF M25 Most | 2021/05/24 08:00 | Ondrej Valek v Alexander Wolfschmidt | 6-2,6-3 |
| ITF M25 Most | 2021/05/23 14:00 | George Loffhagen v Ondrej Valek | 4-6,1-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/16 11:30 | Ondrej Valek v Lucas Bouquet | 7-5,2-6,7-10 |