Stadium: TSITSIPAS COURT Round: 62 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2021/11/03 08:50 | Peter Goldsteiner v Jonathan Backman | 6-2,6-4 |
| ITF M15 Heraklion | 2021/11/02 07:00 | Jonathan Backman v Ioannis Kountourakis | 6-1,6-7,7-10 |
| ITF M15 Heraklion | 2021/11/01 11:00 | Michel-Alexandre Fortin v Jonathan Backman | 4-6,4-6 |
| ITF M25 Falun | 2021/09/26 11:00 | Christian Sigsgaard v Jonathan Backman | 6-1,6-4 |
| ITF M25 Jonkoping | 2021/09/20 09:10 | Robin Thour v Jonathan Backman | 6-4,4-6,10-6 |
| ITF M25 Jonkoping | 2021/09/19 08:00 | Jonathan Backman v Caspar Schuetze | 7-6,6-0 |
| ITF M15 Heraklion | 2021/11/07 11:00 | Gianluca Coloma-Heck v Dong Ju Kim | 2-6,1-6 |
| ITF M15 Monastir | 2021/06/20 12:00 | Timur Kiyamov v Dong Ju Kim | 7-6,6-3 |
| ITF M15 Monastir | 2021/06/14 08:00 | Ajeet Rai v Dong Ju Kim | 5-7,6-4,12-10 |
| ITF M15 Monastir | 2021/06/13 11:30 | Lucas Cotler v Dong Ju Kim | 2-6,2-6 |
| ITF M15 Monastir | 2021/06/09 08:25 | Dong Ju Kim v Uisung Park | 2-6,1-6 |
| ITF M15 Monastir | 2021/06/07 13:30 | Dong Ju Kim v Sungbeen Sim | 6-0,3-6,10-7 |
| ITF M15 Monastir | 2021/06/07 09:00 | Kazuki Nishiwaki v Dong Ju Kim | 2-6,3-6 |
| ITF M15 Monastir | 2021/05/30 09:30 | Dong Ju Kim v Ren Nakamura | 7-5,6-7,5-10 |