Sloane Stephens defeated Serena Williams, advances to Australian Open Semis Sloane Stephens has arrived. She’s 19, ranked 25th in the world, and Tuesday she beat Serena Williams in the quarterfinals of the Australian Open, 3-6, 7-5, 6-4. With this defeat, Sloane became the first American player younger than Serena to ever hand her a loss.
