Mardini competed at the 2020 Summer Olympic Games in Tokyo. She carried the flag of the IOC Refugee Olympic Team in the athletes’ parade in the opening ceremony. In the women’s 100m butterfly, she swam a time of 1:06.78 in the heats, and was eliminated from the next rounds for which only the top 16 women qualified. Mardini's story is told in the short story collection Good Night Stories for Rebel Girls, by Elena Favilli and Francesca Cavallo.
