Stadium: Court 1 Round: 44 Ground: Clay
| ITF M25 Jablonec Nad Nisou | 2021/05/17 08:30 | Hampel, Lenny v Recek, Dominik | 6-2,7-5 |
| ITF M25 Jablonec Nad Nisou | 2021/05/16 11:30 | Hampel, Lenny v Kris Krawcewicz | 7-5,6-2 |
| ITF M25 Prague | 2021/05/11 10:40 | Franco Agamenone v Hampel, Lenny | 6-3,6-3 |
| ITF M25 Prague | 2021/05/10 09:00 | Dominique Graf v Hampel, Lenny | 3-6,4-6 |
| ITF M25 Prague | 2021/05/09 12:30 | Matthew William Donald v Hampel, Lenny | 2-6,6-4,8-10 |
| ITF M15 Bratislava | 2021/03/10 12:05 | Satral, Jan v Hampel, Lenny | 6-4,6-3 |
| ITF M15 Bratislava | 2021/03/02 12:00 | Hampel, Lenny v Rikl, Patrik | 3-6,7-6,2-6 |
| ITF M15 Cairo | 2021/01/30 10:40 | Hampel, Lenny v Gonzalo Lama | 1-6,6-7 |
| ITF M25 Jablonec Nad Nisou | 2021/05/17 10:00 | Lucas Bouquet v Martin Krumich | 2-6,6-3,10-12 |
| ITF M25 Jablonec Nad Nisou | 2021/05/16 11:30 | Martin Benes v Martin Krumich | 4-6,0-6 |
| ITF M25 Prague | 2021/05/11 14:50 | Martin Krumich v Chun Hsin Tseng | 1-6,4-6 |
| Challenger - Ostrava | 2021/04/26 10:40 | Sebastian Baez v Martin Krumich | 6-2,6-2 |
| ITF M15 Bratislava | 2021/03/11 11:10 | Fabian Marozsan v Martin Krumich | 7-5,6-3 |
| ITF M15 Bratislava | 2021/03/10 14:40 | Stepan Pecak v Martin Krumich | 7-6,5-7,1-6 |
| ITF M15 Bratislava | 2021/03/03 09:00 | Mikalai Haliak v Martin Krumich | 6-3,2-6,6-2 |
| ITF M15 St Petersburg | 2021/02/12 10:00 | Martin Krumich v Andrey Kuznetsov | 2-6,6-7 |