Stadium: Court 1 Round: 27 Ground: Clay
| ITF M15 Sharm El Sheikh | 2019/03/28 09:40 | Gilbert S K Junior v Daniel Michalski | 7-6,6-4 |
| ITF M15 Lodž | 2021/08/19 10:30 | Daniel Michalski v Szymon Kielan | 3-6,7-5,6-3 |
| ITF M15 Lodž | 2021/08/18 11:40 | Daniel Michalski v Piotr Grynkowski | 6-1,6-1 |
| ITF M15 Gdyně | 2021/08/13 12:00 | Daniel Michalski v Fabian Marozsan | 4-6,3-6 |
| ITF M15 Gdyně | 2021/08/12 10:30 | Daniel Michalski v Michal Dembek | 7-6,4-6,6-3 |
| ITF M15 Gdyně | 2021/08/11 12:40 | Daniel Michalski v Igor Marcondes | 6-2,6-3 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/05 13:10 | Adam Pavlásek v Daniel Michalski | 7-5,6-4 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/05 07:00 | Aleksander Orlikowski v Daniel Michalski | 2-6,1-6 |
| Challenger Poznan | 2021/07/27 11:50 | Daniel Michalski v Botic Van De Zandschulp | 2-6,3-6 |
| ITF M15 Lodž | 2021/08/19 10:00 | Tommaso Compagnucci v Gilbert S K Junior | 4-6,2-6 |
| ITF M15 Lodž | 2021/08/18 11:25 | Aristotelis Thanos v Gilbert S K Junior | 2-6,3-6 |
| ITF M15 Gdyně | 2021/08/12 09:25 | Gilbert S K Junior v Daniel De Jonge | 5-7,1-6 |
| ITF M15 Gdyně | 2021/08/11 09:40 | Antonin Bolardt v Gilbert S K Junior | 6-2,1-6,2-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/07 07:00 | Gilbert S K Junior v Toby Alex Kodat | 6-1,6-7,3-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/05 08:30 | Filip Peliwo v Gilbert S K Junior | 3-6,5-7 |
| ITF M15 Castelo Branco | 2021/08/01 09:00 | Clement Chidekh v Gilbert S K Junior | 2-6,1-6 |
| ITF M15 Castelo Branco | 2021/07/31 08:30 | Joao Lucas Reis da Silva v Gilbert S K Junior | 6-4,2-6,6-7 |