Stadium: Court 10 Round: 44 Ground: Hardcourt outdoor
| ITF M25 Sintra | 2021/09/12 12:00 | Constantinos Papavasiliou v Pedro D L R Bueno | 1-6,2-6 |
| ITF M25 Sintra | 2021/09/05 12:00 | Constantinos Papavasiliou v Martim Simoes | 1-6,3-6 |
| ITF M15 Cairo | 2021/01/10 14:00 | Babji Siva Atturu v Constantinos Papavasiliou | 6-1,5-7,10-5 |
| ITF M15 Cancun | 2019/12/08 14:00 | Constantinos Papavasiliou v Jack Vance | 1-6,4-6 |
| ITF Turkey F38 | 2018/11/24 09:30 | Constantinos Papavasiliou v Ivan Zaytsev | 6-1,5-7,6-7 |
| ITF Greece F8 | 2018/11/13 09:25 | Stefan Seifert v Constantinos Papavasiliou | 6-0,6-1 |
| ITF Ukraine F4 | 2018/08/26 07:00 | Constantinos Papavasiliou v Oleksandr Varichenko | 0-6,3-6 |
| ITF Germany F11 | 2018/08/05 08:00 | Marvin Rehberg v Constantinos Papavasiliou | 6-1,6-2 |
| ITF M15 Ibague | 2021/09/07 14:00 | Juan Sebastian Osorio v Michael Quintero Aguilar | 1-6,0-6 |
| ITF M15 Ibague | 2021/09/06 20:45 | Eduardo Lacalle v Juan Sebastian Osorio | 4-6,7-5,7-10 |
| ITF M15 Ibague | 2021/09/05 15:00 | Joao Eduardo Schiessl v Juan Sebastian Osorio | 4-6,6-2,4-10 |
| ITF M25 Guayaquil | 2021/08/01 16:30 | Juan Sebastian Osorio v McClain Kessler | 1-6,3-6 |
| ITF M25 Portoviejo | 2021/07/26 14:30 | Mateo Gomez v Juan Sebastian Osorio | 7-5,6-3 |
| ITF M25 Portoviejo | 2021/07/25 14:30 | Giuliano F Z Poggi v Juan Sebastian Osorio | 1-6,1-6 |
| ITF M25 Santo Domingo | 2021/06/06 13:00 | Juan Sebastian Osorio v Franco Ribero | 2-6,6-3,8-10 |
| ITF M25 Santo Domingo | 2021/05/31 13:00 | Justin Roberts v Juan Sebastian Osorio | 6-3,7-6 |