After domination professional tennis for almost two decades, no one is surprised that sisters Serena and Venus Williams are America’s best prospect for an Olympic medal. However, reflecting the influence of on the sport, the four member U.S.A. Women’s single’s tennis team is composed completely of African-American women. Joining the sisters playing singles are Madison Keys, 21, and Sloane Stephens, 23.

The Williams sisters will also play doubles in an effort to repeat their 2012 Gold medal win. Serena, the number one player in the world, also took home singles Gold in the 2012.