Stadium: Court 6 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Quinta Do Lago | 2021/10/18 13:55 | Alan F R Fierros v Noah Thurner | 6-2,6-0 |
| ITF M25 Loule | 2021/10/12 09:30 | Adria Soriano Barrera v Alan F R Fierros | 6-4,6-4 |
| ITF M25 Loule | 2021/10/11 12:00 | Afonso Portugal v Alan F R Fierros | 2-6,6-7 |
| ITF M25 Pardubice | 2021/09/20 10:00 | Tomas Lanik v Alan F R Fierros | 2-6,6-4,10-6 |
| ITF M25 Pardubice | 2021/09/19 11:00 | Michalis Sakellaridis v Alan F R Fierros | 6-7,6-4,3-10 |
| ITF M25 Sintra | 2021/09/15 12:25 | Luciano Darderi v Alan F R Fierros | 7-6,2-6,6-4 |
| ITF M25 Sintra | 2021/09/14 13:20 | Daniel Little v Alan F R Fierros | 4-6,6-7 |
| ITF M25 Sintra | 2021/09/13 12:00 | Afonso Portugal v Alan F R Fierros | 2-6,2-6 |
| Challenger Biel | 2021/09/20 09:00 | Hiroki Moriya v Anton Matusevich | 6-4,5-7,6-4 |
| Challenger Biel | 2021/09/19 08:00 | Anton Matusevich v Alessandro Bega | 6-2,6-1 |
| ITF M25 Sintra | 2021/09/09 11:25 | Anton Matusevich v Paul Jubb | 6-7,6-7 |
| ITF M25 Sintra | 2021/09/08 09:00 | Anton Matusevich v Daniel Little | 6-4,6-4 |
| ITF M25 Idanha-A-Nova | 2021/07/23 09:00 | Anton Matusevich v Gilbert S K Junior | 3-6,3-6 |
| ITF M25 Idanha-A-Nova | 2021/07/22 11:55 | Anton Matusevich v Luis Faria | 6-3,2-6,7-6 |
| ITF M25 Idanha-A-Nova | 2021/07/20 10:45 | Anton Matusevich v Naoki Tajima | 6-3,7-5 |
| ITF M25 Idanha-A-Nova | 2021/07/17 08:30 | Nicolas Moreno De Alboran v Anton Matusevich | 7-6,6-4 |