TIL that in the 84's Olympics, an athlete replaced herself with her twin sister to compete after an injury.

https://remezcla.com/sports/in-1984-these-twins-tried-to-pull-off-a-parent-trap-at-the-olympics/

https://www.reddit.com/r/todayilearned/comments/1621uqv/til_that_in_the_84s_olympics_an_athlete_replaced/