Stadium: Hard 21 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Héraklion | 2021/11/17 07:00 | Alec Deckers v Krainer, L. | 5-7,6-7 |
| ITF - M15 Héraklion | 2021/11/12 08:00 | Alastair Gray v Alec Deckers | 6-3,6-4 |
| ITF - M15 Héraklion | 2021/11/11 07:00 | Guy Den Heijer v Alec Deckers | 4-6,6-7 |
| ITF - M15 Héraklion | 2021/11/10 10:00 | Zsombor Velcz v Alec Deckers | 6-3,0-6,4-6 |
| ITF - M15 Héraklion | 2021/11/09 07:00 | Alec Deckers v Stephanos Schinas | 6-0,7-5 |
| ITF - M15 Héraklion | 2021/11/08 08:00 | Alec Deckers v Panagoulopoulos, Gosse | 6-1,6-3 |
| ITF - M15 Héraklion | 2021/11/07 07:00 | Alec Deckers v Papounidis, Ioannis | 6-3,7-5 |
| ITF - M15 Doha | 2021/10/20 14:15 | Niklas Schell v Alec Deckers | 6-4,6-2 |
| ITF - M15 Héraklion | 2021/11/14 11:00 | Cohen, Eduardo v Markiewicz, James | 6-3,6-4 |
| ITF Germany F4 | 2018/06/16 08:00 | Krstev, Ondrej v Markiewicz, James | 6-1,6-2 |
| ITF Germany F1 | 2018/01/07 08:00 | Aichhorn, Jakob v Markiewicz, James | 6-4,6-2 |
| ITF Germany F15 | 2017/10/15 07:00 | Markiewicz, James v Herzgerodt, Ingo | 6-7,3-6 |
| ITF France F22 Qual | 2017/09/30 16:05 | Louis Dussin v Markiewicz, James | 6-3,6-3 |
| ITF Great Britain F6 | 2017/09/24 09:00 | Markiewicz, James v Hubner, Edward | 2-6,0-6 |
| ITF Great Britain F5 | 2017/09/17 08:00 | Markiewicz, James v Jack Draper | 1-6,2-6 |
| ITF Great Britain F4 | 2017/09/13 15:15 | Markiewicz, James v Antoine Escoffier | 0-6,2-6 |