| Challenger Szczecin | 09/12 17:30 | 25 | [222] Diaz Acosta, Facundo v Daniel Michalski [256] | 7-5,5-7,3-6 | |
| ITF M25 Radomlje | 07/21 12:05 | 26 | Tommaso Compagnucci v Daniel Michalski | 3-6,6-4,6-2 | |
| ITF M25 Radomlje | 07/19 15:00 | 25 | Rikl, Patrik v Daniel Michalski | 3-6,7-5,3-6 | |
| Polish National Championships | 07/16 10:30 | - | [52] Zielinski, Jan v Daniel Michalski [253] | 3-6,2-6 | |
| Polish National Championships | 07/15 10:00 | - | [437] Filip Peliwo v Daniel Michalski [253] | 6-7,3-6 | |
| Challenger Troyes | 06/29 09:45 | 26 | [323] Raul Brancaccio v Daniel Michalski [262] | 5-7,6-4,6-2 | |
| Challenger Troyes | 06/27 17:05 | 25 | [333] Pedro B Dias v Daniel Michalski [262] | 2-6,6-3,1-6 | |
| Challenger - Oeiras | 06/24 11:30 | 27 | [339] Kimmer Coppejans v Daniel Michalski [268] | 5-7,7-6,6-3 | |
| Challenger - Oeiras | 06/22 12:35 | 26 | Daniel Michalski v Pedro Araujo | 6-3,6-3 | |
| Challenger - Oeiras | 06/20 16:25 | 25 | [314] Benjamin Hassan v Daniel Michalski [268] | 4-6,4-6 | |
| Poznan, Poland | 05/31 16:10 | 25 | [278] Daniel Michalski v Georgii Kravchenko [469] | 5-7,2-6 | |
| Poznan, Poland | 05/30 08:30 | 19 | [278] Daniel Michalski v Lucas Gerch [368] | 7-5,5-7,6-0 | |
| Poznan, Poland | 05/29 09:00 | 14 | [278] Daniel Michalski v Chandrasekar, Anirudh [394] | 6-2,6-1 | |
| Poznan, Poland | 05/29 09:00 | 14 | Daniel Michalski v Alexander Donski | Cancelled | |
| Troisdorf, Germany | 05/24 11:55 | 25 | [278] Daniel Michalski v Roman Safiullin [147] | 0-6,1-6 | |
| Tunis, Tunisia | 05/18 09:15 | 26 | [282] Daniel Michalski v Nicola Kuhn [260] | 2-6,6-7 | |
| Tunis, Tunisia | 05/16 14:00 | 25 | [329] Krstin, Pedja v Daniel Michalski [282] | 4-6,0-6 | |
| Challenger Prague | 05/03 08:30 | 25 | [183] Federico Gaio v Daniel Michalski [283] | 6-3,6-1 | |
| Challenger Prague | 05/02 10:00 | 19 | [283] Daniel Michalski v Kamke, Tobias [307] | Walkover | |
| Challenger Prague | 05/01 14:40 | 14 | [291] Daniel Michalski v Fayziev, Sanjar [256] | 5-7,6-2,6-1 | |
| Challenger - Ostrava | 04/27 09:00 | 26 | [243] Vitaliy Sachko v Daniel Michalski [291] | 6-4,4-6,6-2 | |
| Challenger - Ostrava | 04/26 08:30 | 25 | [291] Daniel Michalski v Moraing, Mats [126] | 6-3,7-5 | |
| Challenger - Ostrava | 04/25 08:30 | 19 | [291] Daniel Michalski v Bogdan Bobrov [473] | 6-3,6-3 | |
| Challenger - Ostrava | 04/24 08:30 | 14 | [281] Daniel Michalski v Grigoriy Lomakin [242] | 6-3,6-1 | |
| Challenger - Split | 04/18 08:30 | 19 | [281] Daniel Michalski v Matteo Arnaldi [324] | 1-6,2-6 | |
| Challenger - Split | 04/17 08:00 | 14 | Daniel Michalski v Barun, Bozo | 6-2,6-4 | |
| Challenger - Oeiras | 03/29 16:20 | 25 | [483] Noah Rubin v Daniel Michalski [337] | 4-6,6-3,6-1 | |
| Challenger - Zadar | 03/27 10:00 | 29 | [337] Daniel Michalski v Flavio Cobolli [165] | 4-6,2-6 | |
| Challenger - Zadar | 03/26 12:30 | 28 | [444] Carlos Sanchez Jover v Daniel Michalski [337] | 6-3,2-6,2-6 | |
| Challenger - Zadar | 03/25 11:50 | 27 | [271] Dalibor Svrcina v Daniel Michalski [337] | 3-6,1-6 |