Stadium: Hard Court 6 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2021/11/09 07:00 | Leon Hoeveler v Dong Ju Kim | 1-6,5-7 |
| 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 Villers Les Nancy | 2021/11/07 09:00 | Matt Ponchet v Tom Gentzsch | 6-1,6-4 |
| ITF M15 Parnu | 2021/10/28 08:55 | Tom Gentzsch v Vladimir Ivanov | 7-5,2-6,4-6 |
| ITF M15 Parnu | 2021/10/27 13:55 | Tom Gentzsch v Robertas Vrzesinski | 6-1,6-2 |
| ITF M15 Parnu | 2021/10/26 08:00 | Tom Gentzsch v Oskar Antinheimo | 6-2,6-4 |
| ITF M25 Hamburg | 2021/10/19 09:25 | Daniel Little v Tom Gentzsch | 6-4,6-2 |
| UTR Pro Tennis Series Mulheim | 2021/10/16 08:00 | Benjamin Hassan v Tom Gentzsch | 6-4,6-7,0-0 |
| UTR Pro Tennis Series Mulheim | 2021/10/15 07:00 | Tom Gentzsch v Christian Hansen | 4-6,1-6 |
| UTR Pro Tennis Series Mulheim | 2021/10/14 08:30 | Tom Gentzsch v Alen Moritz Hodzic | 4-6,6-2,5-4 |