Stadium: Court 4 Round: 44 Ground: Clay
| ITF M25 Poznan | 2021/08/22 08:00 | Alessio Vasquez Gehrke v Juliusz Bienkiewicz | 3-6,0-6 |
| ITF M15 Lodz | 2021/08/16 08:00 | Arvid Nordquist v Juliusz Bienkiewicz | 3-6,6-4,10-5 |
| ITF M15 Lodz | 2021/08/15 08:00 | Juliusz Bienkiewicz v Mikolaj Szmyrgala | 6-2,0-6,10-5 |
| ITF M15 Gdynia | 2021/08/10 08:00 | Juliusz Bienkiewicz v Daniel De Jonge | 2-6,6-7 |
| ITF M15 Gdynia | 2021/08/09 08:00 | Andrea Guerrieri v Juliusz Bienkiewicz | 6-2,2-6,7-10 |
| ITF M15 Gdynia | 2021/08/08 08:00 | Juliusz Bienkiewicz v Maciej Kos | 6-4,6-3 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 08:00 | Tomas Lanik v Juliusz Bienkiewicz | 4-6,6-1,10-5 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/01 09:30 | Pietro Schiavetti v Juliusz Bienkiewicz | 2-6,6-2,5-10 |
| ITF M25 Poznan | 2021/08/22 08:00 | Fermin Calvo Barcelo v Adam Bronka | 6-0,6-2 |
| ITF M15 Lodz | 2021/08/16 09:30 | Leonardo Aboian v Fermin Calvo Barcelo | 3-6,7-6,10-7 |
| ITF M15 Lodz | 2021/08/15 09:30 | Yujiro Onuma v Fermin Calvo Barcelo | 1-6,1-6 |
| ITF M15 Monastir | 2021/07/18 09:00 | Fermin Calvo Barcelo v Nikolay Sysoev | 3-6,6-4,6-10 |
| ITF M15 Monastir | 2021/07/12 08:00 | Jake Van Emburgh v Fermin Calvo Barcelo | 6-3,3-6,10-6 |
| ITF M15 Monastir | 2021/07/05 09:00 | Fermin Calvo Barcelo v Valentin Vacherot | 4-6,1-6 |
| UTR Pro Tennis Series Barcelona | 2021/05/02 10:00 | Ilya Snitari v Fermin Calvo Barcelo | 7-6,6-4 |
| UTR Pro Tennis Series Barcelona | 2021/05/01 11:00 | Warren Sinius v Fermin Calvo Barcelo | 0-6,0-5 |