| Uber Cup | 05/01 01:30 | - | Sin Yan Happy Lo v Fadilah Shamika Mohamed Rafi | W | 2-0 | |
| Asia Championships Women | 04/10 06:30 | 5 | 타이, 주 잉 v Sin Yan Happy Lo | L | 2-0 | |
| Polish Open Women | 03/22 10:40 | - | Sin Yan Happy Lo v Upadhyaya, Anupama | - | Walkover | |
| Orleans Masters Women | 03/14 12:45 | 4 | Sin Yan Happy Lo v 왕, 아이리스 | L | 0-2 | |
| Orleans Masters Women | 03/13 12:20 | 5 | 황, 유-희순 v Sin Yan Happy Lo | W | 1-2 | |
| German Open Women | 02/28 14:25 | 5 | 성, 슈오 윤 v Sin Yan Happy Lo | L | 2-1 | |
| German Open Women Qual | 02/27 09:45 | 3 | Sin Yan Happy Lo v 가이탄, 하라마라 | W | 2-0 | |
| German Open Women Qual | 02/27 08:00 | 3 | Sin Yan Happy Lo v Kaloyana Nalbantova | - | Cancelled | |
| Odisha Masters Women | 12/17 11:40 | 1 | Sin Yan Happy Lo v 오쿠하라, 노조미 | L | 1-2 | |
| Odisha Masters Women | 12/16 11:10 | 2 | Sin Yan Happy Lo v 크리스토퍼슨, 라인 | W | 2-1 | |
| Odisha Masters Women | 12/15 08:35 | 3 | Sin Yan Happy Lo v 자코비센, 줄리 다왈 | W | 2-0 | |
| Odisha Masters Women | 12/14 05:30 | 4 | 수, 웬 치 v Sin Yan Happy Lo | W | 0-2 | |
| Odisha Masters Women | 12/13 03:00 | 5 | Sin Yan Happy Lo v 찌우, 핀-친안 | W | 2-0 | |
| Korea Masters 2019, WS, Qualification | 11/07 02:35 | 3 | Sin Yan Happy Lo v Ga Ram Kim | - | away | |
| KL Masters Women | 11/04 06:00 | 2 | Kim, Joo Eun v Sin Yan Happy Lo | L | 2-0 | |
| KL Masters Women | 11/03 08:10 | 3 | Sin Yan Happy Lo v 브이유, 티 뜨랑 | W | 2-1 | |
| KL Masters Women | 11/02 05:00 | - | Sin Yan Happy Lo v Ga Ram Kim | W | 2-1 | |
| KL Masters Women | 11/01 08:40 | 5 | Sin Yan Happy Lo v 수잔토, 율리아 요세핀 | W | 2-1 | |
| Indonesia Masters Women | 10/26 08:35 | 4 | Kim, Joo Eun v Sin Yan Happy Lo | L | 2-1 | |
| Indonesia Masters Women | 10/25 07:50 | 5 | Sin Yan Happy Lo v Radhakrishnan, Kasturi | W | 2-0 | |
| Indonesia Masters Women | 09/06 07:05 | 5 | Aditi Bhatt v Sin Yan Happy Lo | L | 2-1 | |
| Yozu Indonesia Masters 2019, WS, Qualification | 09/05 11:10 | 3 | Sin Yan Happy Lo v Kyla Legiana Agatha | - | Retired | |
| Yozu Indonesia Masters 2019, WS, Qualification | 09/05 06:20 | 4 | 융, 삼 이 v Sin Yan Happy Lo | W | 1-2 | |
| Slovenia Open Women | 05/19 12:50 | - | 슐츠, 아말리에 v Sin Yan Happy Lo | L | 2-1 | |
| Slovenia Open Women Quals | 05/18 13:20 | - | Sin Yan Happy Lo v 치앙, 잉 리 | W | 2-1 | |
| Slovenia Open Women Quals | 05/18 10:30 | - | Yu Si Wang v Sin Yan Happy Lo | W | 0-2 | |
| Slovenia Open Women Quals | 05/17 11:00 | - | Sin Yan Happy Lo v Setien, Ania | W | 2-1 | |
| Swedish Open Women | 05/14 08:20 | - | Hina Akechi v Sin Yan Happy Lo | L | 2-0 | |
| Swedish Open Women | 05/13 14:40 | - | Tara Shah v Sin Yan Happy Lo | W | 0-2 | |
| Swedish Open Women | 05/13 08:20 | - | 폴리카르포바 크세니아 v Sin Yan Happy Lo | W | 0-2 |