Stadium: Court 10 Round: 25 Ground: Clay
| ITF - Gdynia M15 | 2021/08/10 08:00 | Illya Beloborodko v Antonin Bolardt | 6-7,1-6 |
| ITF - Gdynia M15 | 2021/08/09 08:00 | Svyatoslav Ilnytskyy v Antonin Bolardt | 4-6,5-7 |
| ITF - Gdynia M15 | 2021/08/08 08:00 | Mikolaj Szmyrgala v Antonin Bolardt | 2-6,2-6 |
| ITF - Most M25 | 2021/05/27 07:55 | Antonin Bolardt v Markus Eriksson | 6-4,6-4 |
| ITF - Most M25 | 2021/05/26 09:35 | Antonin Bolardt v Marek Gengel | 7-6,6-0 |
| ITF - Most M25 | 2021/05/25 10:10 | Antonin Bolardt v Jakub Beran | 6-1,6-1 |
| ITF - Most M25 | 2021/05/24 09:00 | Antonin Bolardt v Mark Havlicek | 6-2,6-2 |
| ITF - Most M25 | 2021/05/23 15:00 | Antonin Stepanek v Antonin Bolardt | 2-6,4-6 |
| ITF - Grodzisk Mazowiecki M25 | 2021/08/07 07:00 | Gilbert S K Junior v Toby Alex Kodat | 6-1,6-7,3-6 |
| ITF - Grodzisk Mazowiecki M25 | 2021/08/05 08:30 | Filip Peliwo v Gilbert S K Junior | 3-6,5-7 |
| ITF - Castelo Branco M15 | 2021/08/01 09:00 | Clement Chidekh v Gilbert S K Junior | 2-6,1-6 |
| ITF - Castelo Branco M15 | 2021/07/31 08:30 | Joao Lucas Reis da Silva v Gilbert S K Junior | 6-4,2-6,6-7 |
| ITF - Castelo Branco M15 | 2021/07/30 10:00 | Gilbert S K Junior v Sho Shimabukuro | 7-6,6-3 |
| ITF - Castelo Branco M15 | 2021/07/29 08:30 | Garrett Johns v Gilbert S K Junior | 5-7,3-6 |
| ITF - Castelo Branco M15 | 2021/07/27 08:30 | Vilius Gaubas v Gilbert S K Junior | 4-6,3-6 |
| ITF - Idanha-A-Nova M25 | 2021/07/24 08:30 | Gilbert S K Junior v Simon Carr | 2-6,6-7 |