Olympic gymnastics champion Simone Biles is going head-to-head with one of the most vocal opponents of transgender girls and women competing in female sports, former college swimmer Riley Gaines.

Biles — the most decorated Olympic gymnast is history — called the former college athlete “sick” and a “sore loser” in a post on X Friday night.

“You should be uplifting the trans community and perhaps finding a way to make sports inclusive OR creating a new avenue where trans feel safe in sports,” Biles, 28, wrote. “Maybe a transgender category IN ALL sports!!”

“But instead… You bully them,” Biles continued. “One things for sure is no one in sports is safe with you around!!!!!”

As a college swimmer, Gaines tied for fifth place in a competition with then-University of Pennsylvania swi

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