Gaines' extensive history of attacking transgender (and cisgender) women in sports led Biles to call her a "bully" in an X post.

Riley Gaines broke down the personal attack Simone Biles levied on her on social media and what it really meant for the Olympic gold medalist and one of the greatest gymnasts of all-time.

Olympic gymnastics champion Simone Biles and former collegiate swimmer Riley Gaines were involved in a war of words on X over the weekend regarding transgender athletes.