| Dutch Open WD | 2019/10/10 16:45 | Boje/Poulsen v Iwanaga/Nakanishi | W | 0-2 |
| Dutch Open WD | 2019/10/09 13:15 | Iwanaga/Nakanishi v Birch/Smith | W | 2-0 |
| Akita Masters WD | 2019/08/16 03:20 | Iwanaga/Nakanishi v Sakuramoto/Takahata | L | 0-2 |
| Akita Masters WD | 2019/08/15 03:55 | Kawashima/Saito v Iwanaga/Nakanishi | W | 0-2 |
| Akita Masters WD | 2019/08/14 06:00 | Iwanaga/Nakanishi v Istarani/Kusumah | W | 2-0 |
| Finnish Open WD | 2019/04/06 14:30 | Honda/Shimizu v Iwanaga/Nakanishi | L | 2-1 |
| Finnish Open WD | 2019/04/05 19:00 | Pai/Wu v Iwanaga/Nakanishi | W | 0-2 |
| Finnish Open WD | 2019/04/05 14:20 | Iwanaga/Nakanishi v Ercetin/Inci | W | 2-0 |
| Dutch Open WD | 2019/10/10 15:10 | Nistad/Sjoo v Piek/Seinen | W | 0-2 |
| Dutch Open WD | 2019/10/09 14:35 | Pope/Radovska v Piek/Seinen | W | 0-2 |
| Korean Open WD | 2019/09/25 07:20 | Honderich/Tsai v Piek/Seinen | L | 2-0 |
| China Open WD | 2019/09/19 04:30 | Piek/Seinen v Fukushima/Hirota | L | 0-2 |
| China Open WD | 2019/09/18 11:00 | Piek/Seinen v Delrue/Palermo | W | 2-0 |
| World Championships WD | 2019/08/21 09:00 | Matsumoto/Nagahara v Piek/Seinen | L | 2-0 |
| World Championships WD | 2019/08/19 08:00 | Piek/Seinen v Ng/Yeung | W | 2-0 |
| Japan Open WD | 2019/07/23 06:10 | Piek/Seinen v Polii/Rahayu | L | 0-2 |