Simone Biles hit back at former collegiate swimmer Riley Gaines Friday after she shared a celebratory post from the Minnesota State High School League after Champlin Park High School, which includes a transgender pitcher, won the state championship.

Simone Biles and Riley Gaines traded social media barbs over the latter's recent comments advocating for the exclusion of transgender athletes in women's sports.

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