Stadion: Court 19 Round: 54 Ground: Hardcourt outdoor
| ITF - M15 - Daegu | 2019/06/03 05:50 | Geun Jun Kim v Chen Chang | 6-2,6-1 |
| ITF - M15 - Daegu | 2019/06/05 04:35 | Geun Jun Kim v Taisei Ichikawa | 1-6,2-6 |
| ITF - M15 - Daegu | 2019/06/04 02:55 | Geun Jun Kim v Woo Young Lee | 6-1,6-1 |
| ITF - M15 - Daegu | 2019/06/03 05:50 | Geun Jun Kim v Chen Chang | 6-2,6-1 |
| ITF - Korea F6 | 2018/08/28 05:00 | Geun Jun Kim v Dong-Hak Sin | 2-6,3-6 |
| ITF - Korea F6 | 2018/08/26 02:00 | Mu Fu Tsai v Geun Jun Kim | 0-6,1-6 |
| ITF - Korea F5 | 2018/08/18 01:00 | Hyeon il Jung v Geun Jun Kim | 7-6,1-6,4-6 |
| ITF - Korea F4 | 2018/08/15 01:00 | Ju-Hae Moon v Geun Jun Kim | 6-2,6-3 |
| ITF - Korea F4 | 2018/08/14 01:00 | Ki Su Jung v Geun Jun Kim | 2-6,1-6 |
| ITF - M15 - Daegu | 2019/06/03 05:50 | Geun Jun Kim v Chen Chang | 6-2,6-1 |
| ITF - M15 - Karuizawa | 2019/05/27 00:00 | Chen Chang v Sota Fujii | 2-6,0-6 |
| ITF - Thailand F6 | 2018/10/06 07:00 | Rob Reynolds v Chen Chang | 6-2,6-0 |
| ITF - Thailand F5 | 2018/09/29 06:00 | Shunrou Takeshima v Chen Chang | 6-0,6-0 |
| ITF - Taiwan F2 - Qualifikation | 2018/07/23 03:00 | Tomohiro Masabayashi v Chen Chang | 6-0,6-2 |
| ITF - Taiwan F1 - Qualifikation | 2018/07/16 07:30 | Chen Chang v Li-Wei Tan | 2-6,2-6 |
| Challenger - Taipei - Qualifikation | 2018/04/07 02:00 | Chen Chang v Ruan Roelofse | 0-6,3-6 |