Head to Head
| Qatar Open Women | 2017/12/15 08:40 | Dimitrij Ovtcharov v Koki Niwa | L | 4-3 |
| Qatar Open Women | 2017/06/04 09:00 | Dimitrij Ovtcharov v Koki Niwa | W | 3-4 |
| Qatar Open Women | 2017/02/18 14:15 | Dimitrij Ovtcharov v Koki Niwa | L | 4-3 |
Home History
| Olympics 2020 - Men | 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 |
| Japan T League | 2020/12/24 10:30 | Koki Niwa v Kazuhiro Yoshimura | L | 0-3 |
| Japan T League | 2020/12/23 11:35 | Jun Mizutani v Koki Niwa | L | 3-2 |
| Japan T League | 2020/12/22 06:30 | Panagiotis Gionis v Koki Niwa | W | 2-3 |
| Japan T League | 2020/12/20 09:30 | Koki Niwa v Kenta Matsudaira | L | 2-3 |
| Japan T League | 2020/12/16 07:30 | Koki Niwa v Shunsuke Togami | L | 0-3 |
| Japan T League | 2020/12/15 08:00 | Jun Mizutani v Koki Niwa | W | 1-3 |
Away History
| Olympics 2020 - Men | 2021/07/27 05:30 | Dimitrij Ovtcharov v Kirill Skachkov | W | 4-0 |
| European Championships | 2021/06/27 15:40 | Timo Boll v Dimitrij Ovtcharov | L | 4-1 |
| European Championships | 2021/06/27 11:00 | Marcos Freitas v Dimitrij Ovtcharov | W | 2-4 |
| European Championships | 2021/06/26 18:30 | Lubomir Jancarik v Dimitrij Ovtcharov | W | 3-4 |
| European Championships | 2021/06/26 12:00 | Kristian Karlsson v Dimitrij Ovtcharov | W | 2-4 |
| European Championships | 2021/06/25 17:30 | Andrej Gacina v Dimitrij Ovtcharov | W | 2-4 |
| European Championships | 2021/06/24 17:30 | Ibrahim Gunduz v Dimitrij Ovtcharov | W | 1-4 |
| Russia Premier League | 2021/06/13 16:40 | Dimitrij Ovtcharov v Aleksandr Tyutryumov | W | 3-1 |
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