Stadium: Court 2 Round: 54 Ground: Hardcourt indoor
| ITF M15 Sozopol | 2021/10/11 10:00 | Nikolay Nedelchev v Michael Gloeckler | 6-0,6-3 |
| ITF M15 Sozopol | 2021/10/10 12:00 | Maxim Khorozov v Michael Gloeckler | 7-6,2-6,5-10 |
| ITF M15 Sozopol | 2021/10/05 06:30 | Nikolay Nedelchev v Michael Gloeckler | 6-0,6-3 |
| ITF M15 Sozopol | 2021/10/04 07:00 | Samuil Konov v Michael Gloeckler | 3-6,4-6 |
| ITF M25 Pardubice | 2021/09/20 08:00 | Noah Schlagenhauf v Michael Gloeckler | 6-3,6-2 |
| 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 |
| ITF M25 Ricany | 2021/08/29 10:30 | Giovanni Agostinetto v Marcelo Zormann | 3-6,4-6 |
| ITF M25 Caslano | 2021/08/23 16:15 | Yan Sabanin v Giovanni Agostinetto | 6-2,6-2 |
| ITF M15 Gaiba | 2021/06/07 15:25 | Giovanni Agostinetto v Yannik Steinegger | 4-6,3-6 |
| ITF M15 Monastir | 2021/05/23 08:00 | Ezequiel Simonit v Giovanni Agostinetto | 6-2,6-3 |
| ITF M15 Monastir | 2021/05/16 08:00 | Giovanni Agostinetto v Seita Watanabe | 3-6,3-6 |
| ITF M15 Monastir | 2021/05/09 08:00 | Giovanni Agostinetto v Riccardo Chessari | 6-7,0-6 |
| ITF M15 Monastir | 2021/04/04 13:00 | Giovanni Agostinetto v Fabio Coelho | 3-6,1-6 |
| ITF M15 Sharm El Sheikh | 2021/03/15 07:30 | Francesco Vilardo v Giovanni Agostinetto | 6-1,6-3 |