Stadium: Court 5 Round: 25 Ground: Clay
| ITF M25 Marburg | 2021/07/06 12:30 | Andres Gabriel Ciurletti v Yannik Steinegger | 1-6,7-6,3-10 |
| ITF M25 Marburg | 2021/07/05 10:25 | Liam Gavrielides v Yannik Steinegger | 6-1,3-6,9-11 |
| ITF M25 Klosters | 2021/06/23 07:00 | Alexander Erler v Yannik Steinegger | 6-7,6-2,6-1 |
| ITF M25 Klosters | 2021/06/21 07:00 | Davide Tortora v Yannik Steinegger | 5-7,3-6 |
| ITF M25 Klosters | 2021/06/20 08:40 | Johann Lars v Yannik Steinegger | 2-6,4-6 |
| ITF M15 Gaiba | 2021/06/08 11:20 | Giorgio Ricca v Yannik Steinegger | 6-3,5-7,10-7 |
| ITF M15 Gaiba | 2021/06/07 15:25 | Giovanni Agostinetto v Yannik Steinegger | 4-6,3-6 |
| ITF M15 Helsinki | 2021/06/03 07:00 | Yannik Steinegger v Bruno Kuzuhara | 2-6,6-2,3-6 |
| ITF M25 Marburg | 2021/07/06 12:15 | Paul Woerner v Sidane Pontjodikromo | 3-6,5-7 |
| ITF M25 Marburg | 2021/07/05 08:00 | Julian Peter v Sidane Pontjodikromo | 1-6,1-6 |
| ITF M25 The Hague | 2021/07/01 07:30 | Sidane Pontjodikromo v Constantin Bittoun Kouzmine | 6-7,2-6 |
| ITF M25 The Hague | 2021/06/28 10:05 | Mick Veldheer v Sidane Pontjodikromo | 5-7,3-6 |
| ITF M25 The Hague | 2021/06/27 08:00 | Deney Wassermann v Sidane Pontjodikromo | 4-6,3-6 |
| ITF M15 Skopje | 2021/06/09 09:00 | Sidane Pontjodikromo v Daniele Capecchi | 0-6,2-6 |
| ITF M15 Skopje | 2021/06/08 07:30 | Stefano Battaglino v Sidane Pontjodikromo | 4-6,1-6 |
| ITF M15 Skopje | 2021/06/07 08:00 | Charles Tzicas v Sidane Pontjodikromo | 2-6,5-7 |