| Asia Championships XD | 04/10 13:15 | 5 | Puavaranukroh/Taerattanachai v Yap/Siow | L | 2-0 | |
| Masters d'Espagne - Doubles Mixtes | 03/27 18:00 | 5 | Kusumawati/Kusharjanto v Yap/Siow | L | 2-1 | |
| Open de Suisse - Doubles Mixtes | 03/20 16:25 | 5 | Yap/Siow v Karunakaran/Variyath | L | 1-2 | |
| Syed Modi India Int. XD | 11/30 06:45 | - | Yap/Siow v Hee/Tan | L | 1-2 | |
| Syed Modi India Int. XD | 11/29 03:30 | 5 | Sharma / S Ram v Yap/Siow | W | 0-2 | |
| Korea Masters XD | 11/09 01:00 | - | Yap/Siow v Kim/Jeong | L | 0-2 | |
| Korea Masters XD | 11/08 06:20 | 5 | Lee / Hsu v Yap/Siow | W | 0-2 | |
| Indonesia Masters XD | 10/25 07:00 | 5 | Yap/Siow v Choong/Go | - | Walkover | |
| Hong Kong Open 2019, XD | 09/13 11:40 | 5 | Yap/Siow v Mairs/Mairs | L | 1-2 | |
| Hong Kong Open XD Qual | 09/12 01:00 | 3 | Yap/Siow v Yeung S C / Fan K Y | W | 2-0 | |
| Indonesia Masters XD | 09/10 05:00 | 1 | Yap/Siow v Nishi/Sato | W | 2-1 | |
| Indonesia Masters XD | 09/09 05:00 | 2 | Yap/Siow v Faza/Rismawardani | W | 2-1 |