Stadium: Court 3 Round: 62 Ground: Hardcourt outdoor
| ITF M25 Sintra | 2021/09/15 11:55 | Santiago Rodriguez Taverna v Paulo Knippling | 6-0,6-0 |
| ITF M25 Sintra | 2021/09/08 12:45 | Jesse Flores v Paulo Knippling | 6-1,6-1 |
| ITF M15 Oldenzaal | 2021/08/15 14:00 | Guy Den Heijer v Paulo Knippling | 6-3,6-4 |
| ITF M15 Monastir | 2021/07/26 09:00 | Drew Baird v Paulo Knippling | 6-1,6-3 |
| ITF M15 Antalya | 2021/05/30 07:30 | Paulo Knippling v Daniil Savelev | 3-6,1-6 |
| ITF M15 Troisdorf | 2021/05/10 12:30 | Dominik Boehler v Paulo Knippling | 6-0,6-2 |
| ITF M25 Vale Do Lobo | 2021/03/07 12:00 | Paulo Knippling v Angel G Melgar | 3-6,2-6 |
| ITF M25 Vale Do Lobo | 2021/02/22 13:00 | Anthony Genov v Paulo Knippling | 6-3,6-3 |
| ITF M25 Setubal | 2021/10/04 12:30 | Diogo Morais v Keanu Elias Immler | 6-1,6-3 |
| ITF M25 Setubal | 2021/10/03 14:00 | Keanu Elias Immler v Massimo Brambati | 6-2,6-4 |
| ITF M25 Madrid | 2021/09/13 10:30 | Emilien Voisin v Keanu Elias Immler | 4-6,0-6 |
| ITF M25 Sintra | 2021/09/06 13:35 | Francisco Cabral v Keanu Elias Immler | 6-3,6-1 |
| ITF M25 Sintra | 2021/09/05 12:00 | Keanu Elias Immler v Rodrigo Deleu | 6-7,6-1,10-4 |
| ITF M15 Monastir | 2021/07/21 10:10 | Abedallah Shelbayh v Keanu Elias Immler | 6-2,6-4 |
| ITF M15 Monastir | 2021/07/11 13:00 | Keanu Elias Immler v Sebastian Eguez | 6-2,4-6,8-10 |
| ITF M15 Marbella | 2021/05/24 09:00 | Luis Diego Chavez Villalpando v Keanu Elias Immler | 6-4,2-6,10-8 |