| UTR Pro Tennis Series Barcelona | 2021/08/02 10:00 | Jay Friend v Federico Zeballos | 1-6,0-6 |
| Challenger Segovia | 2021/07/25 09:00 | Federico Zeballos v Alexander Cozbinov | 1-6,1-6 |
| Challenger Pozoblanco | 2021/07/23 20:20 | Federico Zeballos v Gregoire Barrere | 4-6,3-6 |
| Challenger Pozoblanco | 2021/07/21 15:00 | Federico Zeballos v Filip Cristian Jianu | 7-6,6-4 |
| Challenger Pozoblanco | 2021/07/20 15:00 | Borna Gojo v Federico Zeballos | 4-6,6-7 |
| Challenger Pozoblanco | 2021/07/19 15:00 | Matteo Martineau v Federico Zeballos | 6-2,6-3 |
| Challenger Todi | 2021/07/12 13:00 | Matheus Pucinelli De Almeida v Federico Zeballos | 6-1,6-3 |
| Challenger Todi | 2021/07/11 08:00 | Alessio De Bernardis v Federico Zeballos | 5-7,1-6 |
| ITF M15 Novomoskovsk | 2021/06/03 16:55 | Aliaksandr Liaonenka v Marat Deviatiarov | 1-6,4-6 |
| ITF M15 Novomoskovsk | 2021/05/26 08:20 | Oleksandr Ovcharenko v Marat Deviatiarov | 7-6,6-4 |
| ITF M15 Tbilisi | 2021/05/18 07:00 | Marat Deviatiarov v Marek Gengel | 1-6,4-6 |
| ITF M15 Jerusalem | 2021/05/13 07:00 | Justin Roberts v Marat Deviatiarov | 6-1,6-2 |
| ITF M15 Jerusalem | 2021/05/12 07:00 | Alec Beckley v Marat Deviatiarov | 1-6,6-7 |
| ITF M15 Ramat Hasharon | 2021/05/07 07:00 | Marat Deviatiarov v Felix Corwin | 5-7,4-6 |
| ITF M15 Ramat Hasharon | 2021/05/06 10:30 | Marat Deviatiarov v Lior Goldenberg | 6-3,6-2 |
| ITF M15 Ramat Hasharon | 2021/05/05 09:10 | Marat Deviatiarov v Roee Benya | 7-6,6-0 |