Stadium: Court 17 Round: 25 Ground: Clay
| ITF M15 Brasilia | 2021/11/03 15:50 | Joao Eduardo Schiessl v Oscar Jose Gutierrez | 3-6,5-7 |
| ITF M15 Brasilia | 2021/11/02 12:00 | Joao Eduardo Schiessl v Paulo A S Dos Santos | 6-1,7-5 |
| ITF M25 Rio do Sul | 2021/10/21 17:35 | Ignacio Carou v Joao Eduardo Schiessl | 6-4,6-2 |
| ITF M25 Rio do Sul | 2021/10/19 14:55 | Joao Eduardo Schiessl v Mateus Alves | 6-4,3-6,7-6 |
| ITF M15 Recife | 2021/09/23 13:30 | Nicolas Zanellato v Joao Eduardo Schiessl | 7-5,6-0 |
| ITF M15 Recife | 2021/09/22 14:10 | Joao Eduardo Schiessl v Ignacio Carou | 0-6,6-2,7-6 |
| ITF M25 Medellin | 2021/09/12 15:00 | Pedro Sakamoto v Joao Eduardo Schiessl | 6-2,6-1 |
| ITF M15 Ibague | 2021/09/05 15:00 | Joao Eduardo Schiessl v Juan Sebastian Osorio | 4-6,6-2,4-10 |
| ITF M15 Brasilia | 2021/11/04 15:20 | Arklon H D Pino v Valerio Aboian | 6-3,6-7,6-2 |
| ITF M15 Brasilia | 2021/11/03 15:05 | Valerio Aboian v Gabriel Roveri Sidney | 6-3,6-2 |
| Challenger Buenos Aires | 2021/10/17 15:35 | Mariano Kestelboim v Valerio Aboian | 6-1,6-2 |
| ITF M15 Cairo | 2021/09/24 11:25 | Valerio Aboian v Gabriele Maria Noce | 3-6,4-6 |
| ITF M15 Cairo | 2021/09/23 08:00 | Valerio Aboian v Andrea Picchione | 6-2,6-4 |
| ITF M15 Cairo | 2021/09/22 08:00 | Davide Galoppini v Valerio Aboian | 6-2,2-6,4-6 |
| ITF M15 Cairo | 2021/09/21 08:00 | Valerio Aboian v Gian Marco Ortenzi | 7-6,6-3 |
| ITF M15 Cairo | 2021/09/20 08:00 | Valerio Aboian v Karim El Feky | 6-0,6-1 |