Head to Head
| Australian Open Qual | 2019/06/04 00:10 | Feixiang Sun v Koki Watanabe | L | 2-1 |
| New Zealand Open Qual | 2019/04/29 22:35 | Koki Watanabe v Feixiang Sun | L | 0-2 |
Home History
| Vietnam Open | 2019/09/12 02:00 | Kwang Hee Heo v Koki Watanabe | W | 1-2 |
| Vietnam Open | 2019/09/11 02:30 | Koki Watanabe v Miha Ivanic | W | 2-0 |
| Chinese Taipei Open | 2019/09/07 05:00 | Kwang Hee Heo v Koki Watanabe | L | 2-1 |
| Chinese Taipei Open | 2019/09/06 09:00 | Chia Hung Lu v Koki Watanabe | W | 0-2 |
| Chinese Taipei Open | 2019/09/05 09:15 | Koki Watanabe v Kean Yew Loh | W | 2-1 |
| Chinese Taipei Open | 2019/09/04 12:30 | Chih Chieh Yang v Koki Watanabe | W | 0-2 |
| Akita Masters | 2019/08/16 02:15 | Yu Igarashi v Koki Watanabe | L | 2-1 |
| Akita Masters | 2019/08/15 05:25 | Koki Watanabe v Pannawit Thongnuam | W | 2-0 |
Away History
| Vietnam Open | 2019/09/12 02:00 | Feixiang Sun v Hongyang Weng | W | 2-1 |
| Akita Masters | 2019/08/14 04:50 | Feixiang Sun v Firman Abdul Kholik | L | 1-2 |
| Hyderabad Open | 2019/08/08 09:20 | Feixiang Sun v Sourabh Verma | L | 0-2 |
| Hyderabad Open | 2019/08/07 10:00 | Feixiang Sun v Giap Chin Goh | W | 2-0 |
| Hyderabad Open | 2019/08/06 14:10 | Feixiang Sun v Xiaodong Sheng | W | 2-0 |
| Thailand Open Qual | 2019/07/30 07:40 | Sony Dwi Kuncoro v Feixiang Sun | L | 2-0 |
| Thailand Open Qual | 2019/07/30 03:45 | Feixiang Sun v Thomas Rouxel | W | 2-0 |
| US Open | 2019/07/13 03:25 | Tanongsak Saensomboonsuk v Feixiang Sun | L | 2-1 |