Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| Challenger Santiago | 2021/10/11 19:10 | Nicolas Kicker v Matias Soto | 6-3,6-0 |
| Challenger Santiago | 2021/10/03 17:40 | Nicolas Alvarez v Matias Soto | 7-6,6-1 |
| ITF M15 Perugia | 2021/07/18 13:15 | Matias Soto v Andrea Gola | 6-7,3-6 |
| ITF M15 L'Aquila | 2021/07/14 15:20 | Luca Nardi v Matias Soto | 6-3,7-5 |
| ITF M15 L'Aquila | 2021/07/13 08:00 | Matias Soto v Gian M Di Natale | 6-3,6-4 |
| ITF M15 L'Aquila | 2021/07/12 10:30 | Matias Soto v Niccolo Catini | 5-7,6-3,11-9 |
| ITF M15 L'Aquila | 2021/07/11 11:00 | Matias Soto v Marco Migliorati | 6-3,6-4 |
| ITF M15 Poprad | 2021/07/08 08:00 | Filip Peliwo v Matias Soto | 6-2,6-2 |
| ITF M15 Tallahassee | 2021/10/28 14:00 | Bruno Kuzuhara v Henry Patten | 3-6,6-7 |
| ITF M15 Tallahassee | 2021/10/27 18:50 | Guy Orly Iradukunda v Bruno Kuzuhara | 4-6,7-6,2-6 |
| ITF M15 Vero Beach | 2021/10/20 17:55 | Bruno Kuzuhara v Ben Shelton | 5-7,6-7 |
| ITF M15 Naples | 2021/10/12 15:00 | Bruno Kuzuhara v Juan Ignacio Galarza | 3-6,4-6 |
| ITF M15 Naples | 2021/10/05 14:30 | Bruno Kuzuhara v Liam Draxl | 3-6,4-6 |
| ITF M25 Champaign | 2021/07/27 17:00 | Bruno Kuzuhara v Joshua Peck | 5-7,5-7 |
| ITF M25 Champaign | 2021/07/26 15:00 | Alexander Brown v Bruno Kuzuhara | 4-6,6-2,6-10 |
| ITF M15 Edwardsville | 2021/07/22 14:25 | Bruno Kuzuhara v Blaise Bicknell | 7-6,6-7,1-6 |