Stadium: Pista 2 Round: 25 Ground: Clay
| 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 Braga | 2021/09/19 11:50 | Nikolas Sanchez Izquierdo v Henrique Rocha | 6-2,7-5 |
| ITF M25 Madrid | 2021/09/18 12:30 | Luca Nardi v Nikolas Sanchez Izquierdo | 7-5,6-3 |
| ITF M25 Madrid | 2021/09/17 10:45 | Nikolas Sanchez Izquierdo v Filip Misolic | 6-3,6-2 |
| Challenger Orleans | 2021/09/26 13:35 | Teymuraz Gabashvili v Titouan Droguet | 2-6,6-3,3-6 |
| Challenger Bucharest | 2021/09/23 11:30 | Teymuraz Gabashvili v Nicholas David Ionel | 3-6,3-6 |
| Challenger Bucharest | 2021/09/21 13:10 | Zdenek Kolar v Teymuraz Gabashvili | 5-7,4-6 |
| Challenger Rennes | 2021/09/17 12:25 | Teymuraz Gabashvili v Mats Moraing | 2-6,6-7 |
| Challenger Rennes | 2021/09/16 08:00 | Teymuraz Gabashvili v Ernesto Escobedo | 4-6,6-2,6-3 |
| Challenger Rennes | 2021/09/14 18:55 | Gilles Simon v Teymuraz Gabashvili | 3-6,2-6 |
| Challenger Seville | 2021/09/07 19:00 | Teymuraz Gabashvili v Federico Gaio | 2-6,1-6 |
| Challenger Como | 2021/08/30 15:30 | Andrea Arnaboldi v Teymuraz Gabashvili | 7-6,6-2 |