Stadium: Court 3 Round: 62 Ground: Clay
| Challenger Seville | 2021/09/06 11:00 | Nikolas Sanchez Izquierdo v Tomas Barrios Vera | 6-4,2-6,5-7 |
| Challenger Prague | 2021/08/24 08:30 | Nikolas Sanchez Izquierdo v Franco Agamenone | 3-6,3-6 |
| ITF M25 Prostejov | 2021/08/21 07:50 | Facundo Diaz Acosta v Nikolas Sanchez Izquierdo | 4-6,6-1,4-6 |
| ITF M25 Prostejov | 2021/08/20 08:00 | Nikolas Sanchez Izquierdo v Alex Rybakov | 6-3,6-2 |
| ITF M25 Prostejov | 2021/08/19 10:10 | Zsombor Piros v Nikolas Sanchez Izquierdo | 6-4,6-7,2-6 |
| ITF M25 Prostejov | 2021/08/18 08:00 | Martin Krumich v Nikolas Sanchez Izquierdo | 0-6,2-6 |
| 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 |
| ITF M25 Madrid | 2021/09/12 13:00 | Inaki Cabrera Bello v Vojtech Vlkovsky | 3-6,0-6 |
| ITF M15 Bad Waltersdorf | 2021/08/30 07:00 | Vojtech Vlkovsky v Hasan Ibrahim | 5-7,6-2,10-12 |
| ITF M25 Poznan | 2021/08/22 08:00 | Harry Wendelken v Vojtech Vlkovsky | 6-3,6-4 |
| ITF M25 Prostejov | 2021/08/15 09:00 | Vojtech Vlkovsky v Ondrej Valek | 6-4,4-6,9-11 |
| ITF M15 Gdynia | 2021/08/09 08:00 | Roman Andres Burruchaga v Vojtech Vlkovsky | 6-4,6-1 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/04 16:45 | Vojtech Vlkovsky v Maciej Rajski | 0-6,3-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 13:00 | Yujiro Onuma v Vojtech Vlkovsky | 1-6,0-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 07:55 | Vojtech Vlkovsky v Martyn Pawelski | 6-1,7-6 |