Stadium: Court 5 Round: 26 Ground: Clay
| ITF M15 Antalya | 2021/10/12 08:40 | Daniel Michalski v Santiago De La Fuente | 6-1,6-1 |
| Challenger Lisbon | 2021/09/30 14:40 | Joao Domingues v Daniel Michalski | 6-2,6-2 |
| Challenger Lisbon | 2021/09/28 15:15 | Daniel Michalski v Taro Daniel | 7-6,5-7,6-2 |
| Challenger Lisbon | 2021/09/27 11:30 | Lucas Gerch v Daniel Michalski | 6-7,3-6 |
| Challenger Lisbon | 2021/09/26 14:00 | Daniel Michalski v Giovanni Fonio | 6-4,7-5 |
| Challenger Braga | 2021/09/20 09:00 | Daniel Michalski v Santiago Rodriguez Taverna | 2-6,3-6 |
| Challenger Braga | 2021/09/19 09:00 | Nicolas Moreno De Alboran v Daniel Michalski | 4-6,4-6 |
| Challenger Szczecin | 2021/09/13 13:40 | Daniel Michalski v Thai-Son Kwiatkowski | 3-6,6-4,1-6 |
| ITF M15 Antalya | 2021/10/13 09:00 | Lukas H Lilleengen v Kristof Minarik | 2-6,6-4,6-1 |
| ITF M15 Antalya | 2021/10/12 07:00 | Lukas H Lilleengen v John Sperle | 3-6,6-3,10-8 |
| ITF M15 Antalya | 2021/10/11 09:00 | Lukas H Lilleengen v Gonzalo Zeitune | 6-4,6-0 |
| ITF M15 Cairo | 2021/09/21 08:00 | Giovanni Calvano v Lukas H Lilleengen | 6-2,6-1 |
| ITF M15 Cairo | 2021/09/20 08:00 | Julian Gimenez v Lukas H Lilleengen | 1-6,4-6 |
| ITF M15 Cairo | 2021/09/19 08:30 | Lakshya Gupta v Lukas H Lilleengen | 0-6,4-6 |
| ITF M15 Cairo | 2021/09/13 07:00 | Gabriel Roveri Sidney v Lukas H Lilleengen | 6-3,6-7,10-8 |
| ITF M15 Cairo | 2021/09/12 11:00 | Atharva Sharma v Lukas H Lilleengen | 6-1,2-6,6-10 |