Stadium: Court 2 Round: 54 Ground: Clay
| ITF M15 Vejle | 2021/07/25 11:00 | Yannik Steinegger v Johannes Ingildsen | 6-4,6-2 |
| ITF M25 Marburg | 2021/07/07 08:45 | Yannik Steinegger v Sidane Pontjodikromo | 0-6,6-7 |
| 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 Vejle | 2021/07/25 11:00 | Pietro Schiavetti v Leonardo Catani | 2-6,0-6 |
| ITF M15 Perugia | 2021/07/18 11:30 | Leonardo Catani v Federico Bertuccioli | 4-6,2-6 |
| ITF M15 Gaiba | 2021/06/07 09:30 | Julien De Cuyper v Leonardo Catani | 6-3,6-3 |
| ITF M15 Cairo | 2021/05/04 07:55 | Rimpei Kawakami v Leonardo Catani | 7-5,6-0 |
| ITF M15 Cairo | 2021/05/03 12:30 | Leonardo Catani v Luka Petrovic | 7-6,1-6,10-3 |
| ITF M15 Cairo | 2021/05/02 08:00 | Michael Bassem Sobhy v Leonardo Catani | 2-6,3-6 |
| ITF M15 Cairo | 2021/04/25 07:30 | Yanais Laurent v Leonardo Catani | 6-3,2-6,10-3 |
| ITF M15 New Delhi | 2021/03/28 13:00 | Leonardo Catani v Henry Patten | 2-6,3-6 |