Stadium: Court 17 Round: 62 Ground: Clay
| ITF M15 Antalya | 2021/10/10 07:00 | Lambert Ruland v Adrian Mateo Bejenaru | 6-3,7-5 |
| ITF M25 Ricany | 2021/08/30 08:30 | Lambert Ruland v Jimmy Yang | 7-6,6-7,9-11 |
| ITF M25 Ricany | 2021/08/29 08:00 | Ondrej Horak v Lambert Ruland | 1-6,1-6 |
| Challenger Luedenscheid | 2021/08/15 13:30 | Lambert Ruland v Filip Cristian Jianu | 4-6,2-6 |
| ITF M15 Antalya | 2021/10/10 07:00 | Vitek Horak v Goran Zivotic | 6-4,6-4 |
| ITF M25 Prague | 2021/10/03 13:00 | Milos Karol v Vitek Horak | 6-0,6-1 |
| ITF M25 Pardubice | 2021/09/20 10:00 | Vitek Horak v Mark Havlicek | 6-7,3-6 |
| ITF M25 Pardubice | 2021/09/19 10:00 | Radovan Michalik v Vitek Horak | 6-7,3-6 |
| ITF M25 Ricany | 2021/08/30 10:00 | Stepan Baum v Vitek Horak | 6-4,6-2 |
| ITF M25 Most | 2021/05/23 08:00 | Adam Januska v Vitek Horak | 6-3,6-4 |
| ITF M25 Jablonec Nad Nisou | 2021/05/16 08:30 | Jean Thirouin v Vitek Horak | 7-5,6-0 |
| ITF M15 Milovice | 2019/11/11 12:00 | Petr Michnev v Vitek Horak | 6-2,6-4 |