Head to Head
| German Open | 2019/10/11 16:40 | Youngsik Jeoung v Koki Niwa | W | 4-3 |
| Qatar Open - XD | 2018/02/24 17:40 | Koki Niwa v Youngsik Jeoung | W | 1-3 |
Home History
| Olimpiada 2020 - Mężczyźni - Drużynowo 2020 | 2021/08/02 06:30 | Gustavo Tsuboi v Youngsik Jeoung | W | 2-3 |
| Olimpiada 2020 - Mężczyźni - Drużynowo 2020 | 2021/08/01 02:00 | Bojan Tokic v Youngsik Jeoung | L | 3-1 |
| Olimpiada 2020 - Mężczyźni 2020 | 2021/07/28 02:00 | Zhendong Fan v Youngsik Jeoung | L | 4-0 |
| Olimpiada 2020 - Mężczyźni 2020 | 2021/07/27 07:30 | Youngsik Jeoung v Timo Boll | W | 4-1 |
| Olimpiada 2020 - Mężczyźni 2020 | 2021/07/27 01:00 | Youngsik Jeoung v Panagiotis Gionis | W | 4-3 |
| WTT Star Contender Doha | 2021/03/11 11:00 | Tomokazu Harimoto v Youngsik Jeoung | L | 3-0 |
| WTT Star Contender Doha | 2021/03/10 07:15 | Gustavo Tsuboi v Youngsik Jeoung | W | 1-3 |
| WTT Star Contender Doha | 2021/03/09 08:35 | Kirill Gerassimenko v Youngsik Jeoung | W | 2-3 |
Away History
| Olimpiada 2020 - Mężczyźni - Drużynowo 2020 | 2021/08/04 13:30 | Koki Niwa v Dimitrij Ovtcharov | L | 0-3 |
| Olimpiada 2020 - Mężczyźni - Drużynowo 2020 | 2021/08/03 02:30 | Koki Niwa v Mattias Falck | W | 3-0 |
| Olimpiada 2020 - Mężczyźni 2020 | 2021/07/27 12:30 | Koki Niwa v Dimitrij Ovtcharov | L | 1-4 |
| Olimpiada 2020 - Mężczyźni 2020 | 2021/07/27 06:30 | Koki Niwa v Yang Wang | W | 4-0 |
| WTT Star Contender Doha | 2021/03/09 12:35 | Koki Niwa v Gustavo Tsuboi | L | 0-3 |
| Japonia - T League | 2020/12/24 10:30 | Koki Niwa v Kazuhiro Yoshimura | L | 0-3 |
| Japonia - T League | 2020/12/23 11:35 | Jun Mizutani v Koki Niwa | L | 3-2 |
| Japonia - T League | 2020/12/22 06:30 | Panagiotis Gionis v Koki Niwa | W | 2-3 |
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