Stadium: Hard 20 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Héraklion | 2021/11/07 11:00 | Adam Jurajda v Hoeveler, Leon | 6-2,2-6,8-10 |
| ITF - M15 Héraklion | 2021/11/03 10:20 | Romios, Matthew Christopher v Hoeveler, Leon | 6-3,6-1 |
| ITF - M15 Héraklion | 2021/11/02 07:00 | Hoeveler, Leon v Axel Bergdahl | 7-6,7-6 |
| ITF M25 Hamburg | 2021/10/17 10:35 | Dhoe, Benjamin v Hoeveler, Leon | 4-6,6-1,10-6 |
| ITF M15 Forbach | 2021/09/27 08:00 | Cyril Vandermeersch v Hoeveler, Leon | 6-3,6-1 |
| ITF M15 Forbach | 2021/09/26 09:55 | Raphael Vaksmann v Hoeveler, Leon | 3-6,1-6 |
| ITF M25 Eupen | 2021/09/06 09:55 | Thomas Deschamps v Hoeveler, Leon | 6-1,6-3 |
| ITF M25 Eupen | 2021/09/05 12:00 | Hoeveler, Leon v Alen Moritz Hodzic | 6-3,0-6,11-9 |
| ITF - M15 Héraklion | 2021/11/08 11:00 | Jonathan Backman v Kim, Dong Ju | 4-6,4-6 |
| ITF - M15 Héraklion | 2021/11/07 11:00 | Gianluca Coloma-Heck v Kim, Dong Ju | 2-6,1-6 |
| ITF - M15 Monastir | 2021/06/20 12:00 | Kiyamov, Timur v Kim, Dong Ju | 7-6,6-3 |
| ITF - M15 Monastir | 2021/06/14 08:00 | Ajeet Rai v Kim, Dong Ju | 5-7,6-4,12-10 |
| ITF - M15 Monastir | 2021/06/13 11:30 | Cotler, Lucas v Kim, Dong Ju | 2-6,2-6 |
| ITF - M15 Monastir | 2021/06/09 08:25 | Kim, Dong Ju v Park, Uisung | 2-6,1-6 |
| ITF - M15 Monastir | 2021/06/07 13:30 | Kim, Dong Ju v Sungbeen Sim | 6-0,3-6,10-7 |
| ITF - M15 Monastir | 2021/06/07 09:00 | Kazuki Nishiwaki v Kim, Dong Ju | 2-6,3-6 |