Stadium: Central Round: 19 Ground: Hardcourt indoor
| ITF M15 La Nucia | 2021/03/12 09:25 | Georgii Kravchenko v Nikolas Sanchez Izquierdo | 4-6,1-6 |
| ITF M15 Valldoreix | 2019/05/15 08:30 | Georgii Kravchenko v Nikolas Sanchez Izquierdo | 2-6,6-7 |
| Challenger Pau | 2021/11/14 11:15 | Nikolas Sanchez Izquierdo v Piotr Matuszewski | 6-2,6-1 |
| Challenger Buenos Aires | 2021/10/19 15:40 | Juan Pablo Ficovich v Nikolas Sanchez Izquierdo | 7-6,7-6 |
| Challenger Barcelona | 2021/10/05 13:35 | Nikolas Sanchez Izquierdo v Teymuraz Gabashvili | 5-7,2-6 |
| Challenger Murcia | 2021/09/28 10:50 | Nikolas Sanchez Izquierdo v Tallon Griekspoor | 3-6,1-6 |
| Challenger Braga | 2021/09/25 13:30 | Nikola Milojevic v Nikolas Sanchez Izquierdo | 6-2,6-4 |
| Challenger Braga | 2021/09/25 10:00 | Nikolas Sanchez Izquierdo v Taro Daniel | 6-3,6-2 |
| Challenger Braga | 2021/09/23 09:00 | Nikolas Sanchez Izquierdo v Andrea Collarini | 7-5,6-2 |
| Challenger Braga | 2021/09/20 09:00 | Nikolas Sanchez Izquierdo v Sebastian Fanselow | 6-4,1-6,6-3 |
| Challenger Roanne | 2021/11/10 20:25 | Hiroki Moriya v Georgii Kravchenko | 3-6,6-4,7-5 |
| Challenger Roanne | 2021/11/09 17:05 | Georgii Kravchenko v Henri Laaksonen | 6-4,6-4 |
| Challenger Roanne | 2021/11/07 12:10 | Arthur Fils v Georgii Kravchenko | 4-6,4-6 |
| Challenger Tenerife | 2021/10/31 12:55 | Vladyslav Orlov v Georgii Kravchenko | 7-6,6-2 |
| Challenger Losinj | 2021/10/21 10:40 | Nerman Fatic v Georgii Kravchenko | 6-3,2-6,6-3 |
| Challenger Losinj | 2021/10/19 11:45 | Georgii Kravchenko v Blaz Rola | 6-4,6-2 |
| Challenger Losinj | 2021/10/18 08:00 | Georgii Kravchenko v Anirudh Chandrasekar | 6-0,6-1 |
| Challenger Losinj | 2021/10/17 09:25 | Georgii Kravchenko v Gal Emersic Potocnik | 6-2,6-2 |