Stadium: Court 2 Round: 62 Ground: Clay
| ITF M25 Eupen | 2021/09/05 12:00 | Noah Schlagenhauf v Mateo Nicolas Martinez | 3-6,4-6 |
| ITF M25 Sierre | 2021/09/01 15:25 | Leandro Riedi v Noah Schlagenhauf | 6-2,6-3 |
| ITF M25 Sierre | 2021/08/30 07:50 | Noah Schlagenhauf v Manfredi Graziani | 6-3,6-4 |
| ITF M25 Sierre | 2021/08/29 08:30 | Charles Minc v Noah Schlagenhauf | 4-6,2-6 |
| ITF M25 Caslano | 2021/08/25 13:10 | Alejandro Gonzalez v Noah Schlagenhauf | 6-4,6-1 |
| ITF M25 Caslano | 2021/08/23 12:15 | Noah Schlagenhauf v Pietro Mugelli | 6-4,6-1 |
| ITF M25 Koksijde | 2021/08/15 11:40 | Noah Schlagenhauf v Ammar Elamin | 4-6,3-6 |
| UTR Pro Tennis Series Ricany | 2021/09/18 07:30 | Lawrence Bataljin v Michael Gloeckler | 6-4,5-2 |
| UTR Pro Tennis Series Ricany | 2021/09/17 09:00 | Michael Gloeckler v Yann Wojcik | 2-6,3-6 |
| UTR Pro Tennis Series Ricany | 2021/09/15 10:30 | Michael Gloeckler v Jan Satral | 2-6,6-6 |
| UTR Pro Tennis Series Ricany | 2021/09/14 09:00 | Michael Gloeckler v Yanais Laurent | 1-6,2-6 |
| UTR Pro Tennis Series Ricany | 2021/09/13 12:00 | Alexander Lazov v Michael Gloeckler | 6-3,6-3 |
| ITF M15 Bad Waltersdorf | 2021/08/22 09:00 | Michael Gloeckler v Giorgio Tabacco | 6-7,6-7 |
| ITF M15 Warmbad-Villach | 2021/08/15 07:00 | Michael Gloeckler v Janos Fekete | 1-6,3-6 |
| ITF M15 Anif | 2020/08/23 07:00 | Matias Franco Descotte v Michael Gloeckler | 6-1,6-3 |