Laviai Nielsen is a track and field athlete who has competed for Great Britain. She competed at the 2020 and 2024 Summer Olympic Games.
She is the twin sister of hurdler Lina Nielsen.
Olympic Results[]
| Year | Event | Result |
|---|---|---|
| 2020 | Women's 4x400m relay | 5th |
| 2024 | Women's 400m | 12th |
| Women's 4x400m relay | 
| |
| Mixed 4x400m relay |
|
2020[]
| Distance | Stage | Time |
|---|---|---|
| 4x400 metres relay | Heats | 3:23.99 (50.92 split) |
| Final | 3:22.59 (Reserve) |
2024[]
| Discipline | Stage | Time | |
|---|---|---|---|
| 400 metres | Heats | 54.84 | |
| Repechage | Bye | ||
| Semifinal | 55.20 | ||
| Final | Did not advance | ||
| 4x400 metres relay | Heats | 3:24.72 (Reserve) |
|
| Final | 3:19.72 (49.40 split) |
NR | |
| Mixed 4x400 metres relay | Heats | 3:10.61 (49.72 split) |
NR |
| Final | 3:08.01 (49.81 split) |
NR | |
 Athletics 2020 • Women's 4x400 metre relay
|
|---|
| Zoey Clark |
| Emily Diamond |
| Laviai Nielsen |
| Ama Pipi |
| Jodie Williams |
| Nicole Yeargin |
| Athletics 2024 • Women's 4x400 metre relay
|
|---|
| Amber Anning |
| Yemi Mary John |
| Hannah Kelly |
| Laviai Nielsen |
| Lina Nielsen |
| Victoria Ohuruogu |
| Jodie Williams |
| Nicole Yeargin |
| Athletics 2024 • Mixed 4x400 metre relay
|
|---|
| Amber Anning |
| Alex Haydock-Wilson |
| Laviai Nielsen |
| Samuel Reardon |
| Nicole Yeargin |