Stadium: Quadra 2 Round: 19 Ground: Hardcourt outdoor
| ITF M15 Curtea de Arges | 2021/08/10 10:00 | Clement Tabur v Matias Zukas | 4-6,2-6 |
| ITF M15 Frederiksberg | 2021/08/05 08:00 | Johannes Ingildsen v Matias Zukas | 6-3,6-1 |
| ITF M15 Vejle | 2021/07/31 07:50 | Ergi Kirkin v Matias Zukas | 6-1,6-4 |
| ITF M15 Vejle | 2021/07/29 08:00 | Matias Zukas v Sandro Kopp | 6-3,6-1 |
| ITF M15 Vejle | 2021/07/27 09:15 | Matias Zukas v Filip Bergevi | 6-2,6-2 |
| ITF M25 Velenje | 2021/07/08 08:00 | Alexander Shevchenko v Matias Zukas | 6-2,6-1 |
| ITF M25 Velenje | 2021/07/07 08:00 | Tom Kocevar-Desman v Matias Zukas | 5-7,0-6 |
| ITF M15 Antalya | 2021/06/29 06:30 | Billy Harris v Matias Zukas | 3-6,6-3,6-4 |
| ITF M15 Antalya | 2021/05/16 07:00 | Eduardo Ribeiro v Arvid Nordquist | 1-6,0-6 |
| ITF M15 Antalya | 2021/05/11 07:00 | Edoardo Eremin v Eduardo Ribeiro | 6-4,7-5 |
| ITF M15 Antalya | 2021/05/10 07:00 | Eduardo Ribeiro v Ignacio Carou | 3-6,7-5,10-4 |
| ITF M15 Antalya | 2021/05/09 07:00 | Credit Chaiyarin v Eduardo Ribeiro | 2-6,2-6 |
| ITF M15 Cairo | 2021/05/04 08:00 | Simon A Ivanov v Eduardo Ribeiro | 4-6,6-3,10-7 |
| ITF M15 Cairo | 2021/05/03 11:00 | Mohab Hamed v Eduardo Ribeiro | 3-6,0-6 |
| ITF M15 Cairo | 2021/05/02 10:00 | Bader Alabdullah v Eduardo Ribeiro | 1-6,3-6 |
| ITF M15 Cairo | 2021/04/27 08:00 | Yanais Laurent v Eduardo Ribeiro | 6-4,6-1 |