Stadion: Court 7 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 - Troisdorf | 2021/05/10 09:30 | Tom Kocevar-Desman v Hazem Naw | 6-3,6-4 |
| ITF - M15 - Troisdorf | 2021/05/09 08:00 | Tom Kocevar-Desman v Mihailo Kecojevic | 6-1,6-2 |
| ITF - M15 - Monastir | 2021/04/06 09:00 | Tom Kocevar-Desman v Sho Shimabukuro | 3-6,6-3,3-6 |
| ITF - M15 - Monastir | 2021/03/29 09:00 | Tom Kocevar-Desman v Hazem Naw | 4-6,1-6 |
| ITF - M15 - Monastir | 2021/03/28 09:30 | Tom Kocevar-Desman v Thomas George Brun | 6-1,6-1 |
| ITF - M15 - Monastir | 2021/02/18 10:35 | Alexander Erler v Tom Kocevar-Desman | 6-1,6-7,6-3 |
| ITF - M15 - Monastir | 2021/02/17 08:00 | Tom Kocevar-Desman v Constant De La Bassetiere | 6-1,6-4 |
| ITF - M15 - Monastir | 2021/02/15 10:00 | Tom Kocevar-Desman v Mohamed Amine Aissa Khelifa | 6-2,6-0 |
| 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 | Yannik Steinegger v Milan Welte | 6-4,6-2 |
| ITF - M15 - St. Petersburg - Qualifikation | 2021/04/11 14:25 | Daniel Ibragimov v Yannik Steinegger | 4-6,6-4,10-7 |
| ITF - M15 - St. Petersburg | 2021/04/05 11:00 | Daniil Glinka v Yannik Steinegger | 6-2,6-2 |
| ITF - M15 - St. Petersburg | 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 |