Stadium: Court 22 Round: 25 Ground: Clay
| ITF M25 Most | 2021/05/25 09:35 | Gijs Brouwer v Martin Krumich | 6-3,5-7,6-4 |
| ITF M25 Jablonec Nad Nisou | 2021/05/20 09:45 | Jiri Lehecka v Martin Krumich | 6-2,6-3 |
| ITF M25 Jablonec Nad Nisou | 2021/05/19 10:40 | Martin Krumich v Christian Lindell | 6-3,6-1 |
| ITF M25 Jablonec Nad Nisou | 2021/05/18 11:00 | Lenny Hampel v Martin Krumich | 6-3,6-4 |
| 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 Antalya | 2021/06/08 09:00 | Timo Stodder v Zakhar Trapeznikov | 6-2,6-0 |
| ITF M15 Antalya | 2021/06/07 12:00 | Nicolas Agustin Lema v Zakhar Trapeznikov | 4-6,1-6 |
| ITF M15 Antalya | 2021/06/06 07:30 | Elijah Poritzky v Zakhar Trapeznikov | 2-6,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/05/02 08:30 | Noah Lopez v Zakhar Trapeznikov | 2-6,6-7 |
| UTR Pro Tennis Series Barcelona | 2021/05/01 11:00 | Zakhar Trapeznikov v Jordi Mas De Ugarte | 2-6,7-6,7-6 |
| UTR Pro Tennis Series Barcelona | 2021/04/30 08:00 | Zakhar Trapeznikov v Ilya Snitari | 6-4,6-3 |
| UTR Pro Tennis Series Barcelona | 2021/04/28 09:30 | Zakhar Trapeznikov v Ivan Gakhov | 2-6,7-5,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/04/27 15:00 | Zakhar Trapeznikov v Jules Marie | 4-6,7-5,6-4 |