Stadium: Court 1 Round: 54 Ground: Clay
| ITF M25 Klosters | 2021/06/21 07:00 | Luca Castelnuovo v Leopold Zima | 6-2,3-6,10-6 |
| ITF M25 Klosters | 2021/06/20 07:00 | Moritz Trocker v Leopold Zima | 2-6,2-6 |
| ITF M15 Genova | 2021/06/17 15:50 | Johan Sebastien Tatlot v Leopold Zima | 6-0,6-2 |
| ITF M15 Genova | 2021/06/16 17:45 | Alessandro Ceppellini v Leopold Zima | 6-4,3-6,2-6 |
| ITF M15 Genova | 2021/06/15 08:55 | Mirko Martinez v Leopold Zima | 5-7,4-6 |
| ITF M15 Genova | 2021/06/14 07:00 | Leopold Zima v Nicolo Turchetti | 6-1,4-6,10-7 |
| ITF M15 Troisdorf | 2021/05/10 11:00 | Leopold Zima v Yannik Steinegger | 2-6,6-7 |
| ITF M15 Troisdorf | 2021/05/09 13:00 | Leopold Zima v Julien De Cuyper | 6-4,6-4 |
| ITF M15 Esch/Alzette | 2021/07/18 09:45 | Lennart Melzer v Andreja Petrovic | 3-6,0-6 |
| ITF M25 Bourg-en-Bresse | 2021/06/27 12:50 | Damien Wenger v Lennart Melzer | 6-1,6-0 |
| ITF M25 La Nucia | 2021/03/14 08:00 | Jorge Martinez Martinez v Lennart Melzer | 6-0,6-1 |
| ITF M15 La Nucia | 2021/03/08 11:00 | Lennart Melzer v Francisco Andreu Garcia | 2-6,1-6 |
| ITF M15 Antalya | 2021/02/28 11:00 | Lennart Melzer v Vito Dell'Elba | 3-6,2-6 |
| ITF M15 Monastir | 2020/12/06 08:00 | Omni Kumar v Lennart Melzer | 6-0,6-0 |
| ITF M25 Nussloch | 2020/01/19 09:00 | Noah Thurner v Lennart Melzer | 6-2,6-4 |
| ITF Germany F11 | 2018/08/05 08:00 | Robi Tholl v Lennart Melzer | 6-0,6-0 |