Round: 62 Ground: Hardcourt outdoor
| ITF M15 St Petersburg Qual | 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 |
| ITF M15 Bratislava | 2020/11/25 15:05 | Savriyan Danilov v Yannik Steinegger | 6-4,3-6,6-2 |
| ITF M15 Sarreguemines | 2020/10/26 13:30 | Yannik Steinegger v Louis Dussin | 4-6,5-7 |
| ITF M25 Meerbusch | 2021/04/16 09:00 | Milan Welte v Alexander Erler | 1-6,4-6 |
| ITF M25 Meerbusch | 2021/04/15 10:00 | Markus Eriksson v Milan Welte | 3-6,1-6 |
| ITF M25 Meerbusch | 2021/04/14 12:15 | Milan Welte v Pietro Rondoni | 6-3,4-6,6-4 |
| ITF M25 Meerbusch | 2021/04/13 13:30 | Mats Rosenkranz v Milan Welte | 2-6,2-6 |
| ITF M25 Meerbusch | 2021/04/12 11:00 | Hendrik Jebens v Milan Welte | 5-7,1-6 |
| ITF M25 Meerbusch | 2021/04/11 13:30 | Jannik Rother v Milan Welte | 2-6,2-6 |
| ITF M25 Biel | 2021/03/29 13:35 | Milan Welte v Jakub Paul | 4-6,1-6 |
| ITF M15 Rovinj | 2021/03/16 09:00 | Milan Welte v Federico Arnaboldi | 2-6,2-6 |