Stadium: Court 6 Round: 62 Ground: Hardcourt outdoor
| ITF M15 - Troisdorf | 2021/05/09 13:00 | Leopold Zima v Julien De Cuyper | 6-4,6-4 |
| ITF M15 - Antalya | 2021/04/25 07:00 | Michel Vernier v Leopold Zima | 4-6,7-6,10-4 |
| ITF M15 - Antalya | 2021/04/20 07:00 | Samuel Vincent Ruggeri v Leopold Zima | 6-3,3-6,11-9 |
| ITF M15 - Antalya | 2021/04/19 07:00 | Leopold Zima v Aleksandre Bakshi | 7-6,6-4 |
| ITF M15 - Antalya | 2021/04/18 07:00 | Leopold Zima v Ivan Kazakov | 6-0,6-3 |
| ITF M25 - Meerbusch | 2021/04/12 09:30 | Alexey Vatutin v Leopold Zima | 6-4,6-2 |
| ITF M25 - La Nucia | 2021/03/19 11:55 | Carlos Gimeno Valero v Leopold Zima | 6-0,6-1 |
| ITF M25 - La Nucia | 2021/03/17 13:20 | Leopold Zima v Axel Garcian | 6-1,7-6 |
| ITF M15 - Troisdorf | 2021/05/09 13:00 | Yannik Steinegger v Milan Welte | 6-4,6-2 |
| ITF M15 - St Petersborg - Kvalifikation | 2021/04/11 14:25 | Daniel Ibragimov v Yannik Steinegger | 4-6,6-4,10-7 |
| ITF - M15 St Petersborg | 2021/04/05 11:00 | Daniil Glinka v Yannik Steinegger | 6-2,6-2 |
| ITF - M15 St Petersborg | 2021/04/04 10:40 | Yannik Steinegger v Egor Noskin | 6-1,6-4 |
| ITF M25 - Biel | 2021/03/29 12:30 | Otto Virtanen v Yannik Steinegger | 6-0,6-4 |
| ITF M25 - Trimbach | 2021/03/09 14:40 | Yannik Steinegger v Alexander Erler | 4-6,4-6 |
| ITF M15 - Grenoble | 2021/02/07 14:55 | Yannik Steinegger v Jurgen Briand | 3-6,7-6,8-10 |
| ITF M15 - Bratislava | 2020/11/25 15:05 | Savriyan Danilov v Yannik Steinegger | 6-4,3-6,6-2 |