Stadium: Court 2 Round: 26 Ground: Clay
| ITF M25 Most | 2021/05/25 11:30 | Viktor Durasovic v Ergi Kirkin | 7-6,5-7,2-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/19 09:45 | Ergi Kirkin v Stanek, Robin | 3-6,7-6,4-6 |
| Challenger Heilbronn | 2021/05/11 10:25 | Ergi Kirkin v Joao Menezes | 6-7,6-2,5-7 |
| Challenger Heilbronn | 2021/05/10 09:30 | Ergi Kirkin v Zizou Bergs | 2-6,6-3,6-4 |
| Challenger Heilbronn | 2021/05/09 10:00 | Torpegaard, Mikael v Ergi Kirkin | 4-6,1-6 |
| ITF M15 LPD Gran Canaria | 2021/04/30 16:00 | Kyrian Jacquet v Ergi Kirkin | 6-3,6-2 |
| ITF M15 LPD Gran Canaria | 2021/04/29 09:00 | Alex M Pujolras v Ergi Kirkin | 6-1,4-6,3-6 |
| ITF M15 LPD Gran Canaria | 2021/04/27 11:20 | Pedro Vives Marcos v Ergi Kirkin | 6-7,7-6,3-6 |
| ITF M25 Most | 2021/05/26 11:10 | Cervinka, Petr v Daniel Michalski | 1-6,1-6 |
| ITF - M15 Antalya | 2021/05/14 07:00 | Orlando Luz v Daniel Michalski | 6-3,6-4 |
| ITF - M15 Antalya | 2021/05/13 09:35 | Madaras, Dragos Nicolae v Daniel Michalski | 7-5,5-7,2-6 |
| ITF - M15 Antalya | 2021/05/12 11:30 | Pierre Yves Bailly v Daniel Michalski | 6-1,2-6,3-6 |
| ITF M15 Cairo | 2021/04/25 09:00 | Oliver Crawford v Daniel Michalski | 6-2,5-7,6-3 |
| ITF M15 Cairo | 2021/04/24 09:00 | Daniel Michalski v Capecchi, Daniele | 2-6,7-6,6-1 |
| ITF M15 Cairo | 2021/04/23 09:00 | Shintaro Mochizuki v Daniel Michalski | 6-3,6-7,4-6 |
| ITF M15 Cairo | 2021/04/22 11:00 | Francesco Passaro v Daniel Michalski | 4-6,2-6 |