Stadium: Court 2 Round: 14 Ground: Clay
| Challenger Oeiras | 2021/05/24 10:00 | Filip Cristian Jianu v Federico Zeballos | 6-4,7-5 |
| Challenger Oeiras | 2021/05/23 10:00 | Federico Zeballos v Vladyslav Orlov | 1-6,6-0,7-6 |
| UTR Pro Tennis Series Florida | 2021/03/12 15:30 | Cristian C. Rodriguez Sanchez v Federico Zeballos | 7-6,1-6,6-6 |
| UTR Pro Tennis Series Florida | 2021/03/11 20:00 | Fletcher Scott v Federico Zeballos | 6-1,6-1 |
| UTR Pro Tennis Series Florida | 2021/03/10 20:00 | Matthew Segura v Federico Zeballos | 6-3,5-3 |
| UTR Pro Tennis Series Florida | 2021/03/08 17:00 | Jorge Panta v Federico Zeballos | 3-6,6-2,6-3 |
| ITF M25 Naples | 2021/02/22 16:00 | Federico Zeballos v Rowland Phillips | 7-5,2-6,7-10 |
| ITF M15 Santo Domingo | 2020/12/08 14:30 | Federico Zeballos v Connor Farren | 0-6,6-3,3-6 |
| Challenger Bratislava | 2021/06/07 11:20 | Uladzimir Ignatik v Skander Mansouri | 6-3,7-5 |
| Challenger Bratislava | 2021/06/06 14:15 | Skander Mansouri v Johannes Haerteis | 6-3,7-5 |
| ITF M15 Sarajevo | 2021/06/04 09:00 | Skander Mansouri v Matheus Pucinelli De Almeida | 3-6,6-3,2-6 |
| ITF M15 Sarajevo | 2021/06/03 09:00 | Skander Mansouri v Duje Kekez | 7-5,6-4 |
| ITF M15 Sarajevo | 2021/06/02 09:00 | Skander Mansouri v Toby Martin | 6-4,6-2 |
| Challenger Salinas 2 | 2021/04/29 15:00 | Nicolas Mejia v Skander Mansouri | 3-6,6-3,6-2 |
| Challenger Salinas 2 | 2021/04/27 20:00 | Skander Mansouri v Joao Menezes | 6-7,6-4,7-6 |
| Challenger Salinas | 2021/04/20 14:30 | Skander Mansouri v Mohamed Aziz Dougaz | 2-6,2-6 |