Stadium: Cancha 1 Round: 28 Ground: Clay
| ITF M25 - Lima | 2021/10/14 16:30 | Federico Zeballos v Gilbert S K Junior | 6-2,3-6,4-6 |
| ITF M25 - Lima | 2021/10/12 17:00 | Antonio Cayetano March v Gilbert S K Junior | 3-6,3-6 |
| Challenger - Santiago | 2021/10/03 19:50 | Gilbert S K Junior v Carlos Gomez-Herrera | 6-3,2-6,3-6 |
| ITF M25 - Medellin | 2021/09/19 15:00 | Gilbert S K Junior v Joao Lucas Reis da Silva | 6-2,6-2 |
| ITF M25 - Medellin | 2021/09/18 14:50 | Pedro Sakamoto v Gilbert S K Junior | 3-6,6-7 |
| ITF M25 - Medellin | 2021/09/17 15:00 | Gilbert S K Junior v Alan Kohen | 6-2,4-6,6-1 |
| ITF M25 - Medellin | 2021/09/16 15:00 | Gilbert S K Junior v Mateo Gomez | 6-3,6-3 |
| ITF M25 - Medellin | 2021/09/14 18:05 | Gilbert S K Junior v Enrique Bogo | 6-1,6-2 |
| ITF M25 - Lima | 2021/10/15 15:00 | Gonzalo Villanueva v Jonathan Mridha | 5-7,6-7 |
| ITF M25 - Lima | 2021/10/14 16:45 | Duilio Vallebuona v Jonathan Mridha | 0-6,1-6 |
| ITF M25 - Lima | 2021/10/13 20:45 | Arklon H D Pino v Jonathan Mridha | 4-6,3-6 |
| Challenger - Santiago | 2021/10/04 16:00 | Oliver Crawford v Jonathan Mridha | 7-5,6-3 |
| Challenger - Santiago | 2021/10/03 19:55 | Jonathan Mridha v Evan King | 6-3,3-6,6-0 |
| Challenger - Murcia | 2021/09/27 09:00 | Emilio Nava v Jonathan Mridha | 6-4,7-5 |
| Challenger - Murcia | 2021/09/26 10:40 | Manish Sureshkumar v Jonathan Mridha | 6-7,4-6 |
| ITF M25 - Jönköping | 2021/09/22 12:10 | Jonathan Mridha v Viktor Durasovic | 4-6,2-6 |