Stadium: Court 1 Round: 25 Ground: Clay
| ITF M25 Grodzisk Mazowiecki | 2021/08/05 13:10 | Adam Pavlasek 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 |
| Polish National Tour | 2021/07/15 10:35 | Daniel Michalski v Kacper Zuk | 2-6,4-6 |
| Polish National Tour | 2021/07/14 11:50 | Maciej Rajski v Daniel Michalski | 0-6,5-7 |
| Polish National Tour | 2021/07/13 11:50 | Mateusz Terczynski v Daniel Michalski | 2-6,1-6 |
| Challenger Braunschweig | 2021/07/06 15:50 | Daniel Michalski v Vit Kopriva | 2-6,2-6 |
| Challenger Braunschweig | 2021/07/05 09:30 | Tim Sandkaulen v Daniel Michalski | 3-6,5-7 |
| ITF M25 Guayaquil | 2021/08/06 15:00 | Ricardo Rodriguez-Pace v Igor Marcondes | 6-3,6-2 |
| ITF M25 Guayaquil | 2021/08/05 14:30 | Alvaro G Meza v Igor Marcondes | 1-6,0-6 |
| ITF M25 Guayaquil | 2021/08/03 17:05 | Igor Marcondes v Mateo Gomez | 6-1,6-0 |
| ITF M25 Portoviejo | 2021/07/28 16:00 | Igor Marcondes v Tristan McCormick | 5-7,6-7 |
| ITF M15 Edwardsville | 2021/07/22 14:20 | Igor Marcondes v Eliot Spizzirri | 6-7,6-7 |
| ITF M15 Edwardsville | 2021/07/21 14:00 | Igor Marcondes v Jibril Nettles | 6-3,6-1 |
| ITF M25 Santo Domingo | 2021/06/13 13:45 | Igor Marcondes v Nicolas Kicker | 7-6,1-6,6-7 |
| ITF M25 Santo Domingo | 2021/06/12 13:30 | Igor Marcondes v Juan A H Serrano | 7-5,2-6,7-5 |