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