Stadium: Court 3 Round: 44 Ground: Clay
| ITF M15 Gdynia | 2021/08/11 09:40 | Bolardt, Antonin v Soares Klier, Gilbert | 6-2,1-6,2-6 |
| ITF M15 Gdynia | 2021/08/10 08:00 | Illya Beloborodko v Bolardt, Antonin | 6-7,1-6 |
| ITF M15 Gdynia | 2021/08/09 08:00 | Ilnytskyy, Svyatoslav v Bolardt, Antonin | 4-6,5-7 |
| ITF M15 Gdynia | 2021/08/08 08:00 | Szmyrgala, Mikolaj v Bolardt, Antonin | 2-6,2-6 |
| ITF M25 Most | 2021/05/27 07:55 | Bolardt, Antonin v Eriksson, Markus | 6-4,6-4 |
| ITF M25 Most | 2021/05/26 09:35 | Bolardt, Antonin v Marek Gengel | 7-6,6-0 |
| ITF M25 Most | 2021/05/25 10:10 | Bolardt, Antonin v Beran, Jakub | 6-1,6-1 |
| ITF M25 Most | 2021/05/24 09:00 | Bolardt, Antonin v Mark Havlicek | 6-2,6-2 |
| ITF M25 Ricany | 2021/08/29 09:00 | Calvo Barcelo, Fermin v Krcma, Tomas | 6-2,6-0 |
| ITF M25 Poznan | 2021/08/25 08:00 | Calvo Barcelo, Fermin v Felix Gill | 3-6,6-7 |
| ITF M25 Poznan | 2021/08/24 16:10 | Harry Wendelken v Calvo Barcelo, Fermin | 6-2,6-3 |
| ITF M25 Poznan | 2021/08/24 08:00 | Juliusz Bienkiewicz v Calvo Barcelo, Fermin | 4-6,2-6 |
| ITF M25 Poznan | 2021/08/22 08:00 | Calvo Barcelo, Fermin v Bronka, Adam | 6-0,6-2 |
| ITF M15 Lodz | 2021/08/16 09:30 | Leonardo Aboian v Calvo Barcelo, Fermin | 3-6,7-6,10-7 |
| ITF M15 Lodz | 2021/08/15 09:30 | Onuma, Yujiro v Calvo Barcelo, Fermin | 1-6,1-6 |
| ITF - M15 Monastir | 2021/07/18 09:00 | Calvo Barcelo, Fermin v Sysoev, Nikolay | 3-6,6-4,6-10 |