Quach Thi Lan (right) and other runners in Heat 3 in action (Photo: AFP/VNA)
In Heat 3 of the category’s Round 1 held on July 31, she ranked fifth out of the eight competitors, clocking 55.51 seconds.
But as Jamaican Leah Nugent was disqualified for running in the wrong lane, Lan earned the fourth place and thus entering the semi-final.
She is the sole Southeast Asian athlete and the only of the Asian origin to compete at the category.
The semi-final is slated for August 2. The Vietnamese athlete will compete against 23 rivals for the top eight places to the final.
The Tokyo 2020 Olympics, started on July 23, will close on August 8.
The Olympics is the largest sporting event in the world. It is held every four years, bringing together the top athletes from countries all over the world./.