Stadium: Court Tsitsipas Round: 62 Ground: Hardcourt outdoor
| ITF - Heraklion M15 | 2021/11/14 11:00 | Jonas Trinker v Ioannis Papounidis | 6-3,1-6,8-10 |
| ITF - Heraklion M15 | 2021/11/07 07:00 | Alec Deckers v Ioannis Papounidis | 6-3,7-5 |
| ITF - Heraklion M15 | 2021/11/03 11:00 | Ioannis Papounidis v Francesco Maestrelli | 1-6,2-6 |
| ITF - Heraklion M15 | 2021/11/02 08:30 | Ioannis Papounidis v Elgin Khoeblal | 4-6,6-2,10-7 |
| ITF - Heraklion M15 | 2021/11/01 09:00 | Michael Weindl v Ioannis Papounidis | 3-6,6-2,3-10 |
| ITF - Heraklion M15 | 2021/06/08 06:30 | Ioannis Papounidis v Ben Jones | 0-6,4-6 |
| ITF - Heraklion M15 | 2021/06/06 07:30 | Petr Hajek v Ioannis Papounidis | 4-6,7-5,6-10 |
| ITF - Heraklion M15 | 2021/05/31 06:30 | Ioannis Papounidis v Volodymyr Uzhylovskyi | 3-6,5-7 |
| ITF - Heraklion M15 | 2021/11/14 09:30 | Dong Ju Kim v Scott Lawrence | 6-0,6-0 |
| ITF - Heraklion M15 | 2021/11/11 08:45 | Francesco Maestrelli v Dong Ju Kim | 6-7,6-4,7-5 |
| ITF - Heraklion M15 | 2021/11/10 11:25 | Dax Donders v Dong Ju Kim | 2-6,6-4,3-6 |
| ITF - Heraklion M15 | 2021/11/09 07:00 | Leon Hoeveler v Dong Ju Kim | 1-6,5-7 |
| ITF - Heraklion M15 | 2021/11/08 11:00 | Jonathan Backman v Dong Ju Kim | 4-6,4-6 |
| ITF - Heraklion M15 | 2021/11/07 11:00 | Gianluca Coloma-Heck v Dong Ju Kim | 2-6,1-6 |
| ITF - Monastir M15 | 2021/06/20 12:00 | Timur Kiyamov v Dong Ju Kim | 7-6,6-3 |
| ITF - Monastir M15 | 2021/06/14 08:00 | Ajeet Rai v Dong Ju Kim | 5-7,6-4,12-10 |