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
| US Open | 2019/07/11 22:00 | Dong Keun Lee v Koki Watanabe | L | 2-1 |
| US Open | 2019/07/10 22:10 | Victor Svendsen v Koki Watanabe | W | 0-2 |
| Canada Open | 2019/07/06 21:30 | Koki Watanabe v Shifeng Li | L | 1-2 |
| Canada Open | 2019/07/05 22:00 | Rajiv Ouseph v Koki Watanabe | W | 0-2 |
| Canada Open | 2019/07/04 21:55 | Lanxi Lei v Koki Watanabe | W | 1-2 |
| Canada Open | 2019/07/03 19:00 | Koki Watanabe v H.S. Prannoy | W | 2-0 |
| Canada Open | 2019/07/03 00:50 | Koki Watanabe v Jason Anthony Ho-Shue | W | 2-0 |
| Australian Open Qual | 2019/06/04 00:10 | Feixiang Sun v Koki Watanabe | L | 2-1 |
Away History
| 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 |
| US Open | 2019/07/11 19:10 | Feixiang Sun v Tzu Wei Wang | W | 2-0 |
| US Open | 2019/07/10 16:10 | Feixiang Sun v Luis Enrique Penalver | W | 2-0 |