Stadium: Court 2 Round: 26 Ground: Clay
| ITF M25 Prostejov | 2021/08/17 09:15 | Martin Krumich v Daniel Siniakov | 3-6,6-4,7-5 |
| Challenger Prague | 2021/08/09 12:30 | Evan Furness v Martin Krumich | 4-6,6-4,6-3 |
| Challenger Liberec | 2021/08/01 12:30 | Evan Furness v Martin Krumich | 6-3,6-2 |
| ITF M25 Kottingbrunn | 2021/07/22 10:10 | Pavel Nejedly v Martin Krumich | 6-3,4-6,6-2 |
| ITF M25 Kottingbrunn | 2021/07/21 09:30 | Martin Krumich v Lukas Neumayer | 7-5,6-2 |
| ITF M25 Kottingbrunn | 2021/07/20 08:00 | Martin Krumich v Lukas Palovic | 7-5,6-2 |
| ITF M25 Kottingbrunn | 2021/07/19 11:05 | Martin Krumich v Francisco T Geschwind | 6-1,6-3 |
| ITF M15 Doboj | 2021/07/17 11:15 | Martin Krumich v Peter Fajta | 2-6,3-6 |
| ITF M25 Prostejov | 2021/08/17 10:35 | Matej Panik v Nikolas Sanchez Izquierdo | 0-6,2-6 |
| Challenger San Marino | 2021/08/09 12:45 | Orlando Luz v Nikolas Sanchez Izquierdo | 6-1,6-7,6-2 |
| Challenger San Marino | 2021/08/08 12:10 | Matteo Arnaldi v Nikolas Sanchez Izquierdo | 1-6,6-4,3-6 |
| Challenger Cordenons | 2021/08/01 13:35 | Francesco Forti v Nikolas Sanchez Izquierdo | 7-6,2-6,6-3 |
| Challenger Segovia | 2021/07/27 16:35 | Feliciano Lopez v Nikolas Sanchez Izquierdo | 6-4,7-6 |
| Challenger Iasi | 2021/07/12 11:35 | Nikolas Sanchez Izquierdo v Nicholas David Ionel | 3-6,6-4,2-6 |
| ITF M25 Casinalbo | 2021/07/08 09:15 | Nikolas Sanchez Izquierdo v Gijs Brouwer | 4-6,4-6 |
| ITF M25 Casinalbo | 2021/07/07 18:30 | Nikolas Sanchez Izquierdo v Simone Roncalli | 3-6,6-3,6-2 |