Stadium: Court 4 Round: 25 Ground: Clay
| ITF M25 Pardubice | 2021/09/21 09:45 | Oscar Galimardanov v Tomas Lanik | 2-6,7-6,8-10 |
| ITF M25 Pardubice | 2021/09/20 10:00 | Tomas Lanik v Alan F R Fierros | 2-6,6-4,10-6 |
| ITF M15 Zilina | 2021/08/31 09:30 | Dominik Kellovsky v Tomas Lanik | 6-1,6-4 |
| ITF M15 Bratislava | 2021/08/23 09:00 | Tomas Lanik v Sean Hess | 5-7,4-6 |
| ITF M15 Bratislava | 2021/08/18 08:00 | Tomas Lanik v Mate Valkusz | 3-6,3-6 |
| ITF M15 Bratislava | 2021/08/17 08:00 | Leyton Rivera v Tomas Lanik | 6-7,2-6 |
| ITF M15 Bratislava | 2021/08/16 10:30 | Tomas Lanik v Milos Karol | 4-6,7-5,12-10 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 14:25 | Svyatoslav Ilnytskyy v Tomas Lanik | 6-3,6-0 |
| ITF M25 Prostejov | 2021/08/16 11:15 | Zsombor Piros v Matthew William Donald | 6-3,6-4 |
| Challenger Liberec | 2021/08/01 14:00 | Matthew William Donald v Rudolf Molleker | 6-4,5-7,5-7 |
| ITF M25 Jablonec Nad Nisou | 2021/05/19 15:15 | Matthew William Donald v Manuel Guinard | 1-6,5-7 |
| ITF M25 Prague | 2021/05/09 12:30 | Matthew William Donald v Lenny Hampel | 2-6,6-4,8-10 |