Vietnam’s Nguyen Thi Huyen failed to qualify for the semi-finals of the women’s 400m in Rio on Saturday.
The 23-year-old runner and hurdler finished sixth in heat six with a time of 52.97s.
That was only good enough to see her place 43rd from the combined eight heats, with only the top 24 women moving on to contest the semi-finals.
Her Olympics aren’t over yet, however, as Nguyen will still be competing in the 400m hurdles next week.
The fastest qualifier on Saturday was American Phyllis Francis, a former junior athletic champion, in a time of 50.58s.
Defending Olympic champion Allyson Felix qualified in sixth place in 51.24s.