Despite the bad weather condition, Lan and seven other runners started their race on time. The 25-year-old was comfortable before the race, wearing a smile on her face.
All eight runners were forced to restart after Norwegian athlete Amalie Luel started the race sooner than others. Luel explained to the referee and was allowed to compete, but in the end, her result was not counted.
The race ended with American Dalilah Muhammad finishing first, in 53.30 seconds, followed by Janieve Russell of Jamaica.
The 24 athletes advancing to the semifinal were divided into three groups, with the top two in each going on to the final along with the two best third-place finishers. Muhammad and Russell advanced to the final from Lan’s group.
Lan finished her run in 56.78 seconds and finished sixth, result not enough for her to advance.
In the first round, Lan had finished fifth, but moved to fourth after a runner was eliminated for crossing lanes, allowing her to proceed to the semifinal.
Lan’s personal best in this race is 55.30 seconds, which helped her win the gold medal at the 2018 Asian Games.
With Lan’s exit, there is no Vietnamese athlete left at the Tokyo Olympics. A total of 18 athletes competed in 11 sports, but did not manage a podium finish.