Emma Raducanu didn’t need the experience of playing for years on the pro circuit or testing her game against the top women in the world. She didn’t even need a direct entry into the U.S. Open. As it turned out, all the 18-year old phenomenon from Great Britain needed to win a Grand Slam title was her preternatural poise, her massive forehand and a stage like Arthur Ashe Stadium to showcase a level of ability nobody in the world could have known she had. In the most surprising Grand Slam result in the history of the sport, Raducanu won the U.S. Open title on Saturday, defeating Leylah Fernandez of Canada 6-4, 6-3, to conclude just the fifth tournament she’s ever entered at the highest level of women’s tennis. Ranked in the 300s just two months ago and No. 150 entering the U.S. Open, Raducanu didn’t just beat everyone she faced in New York, she absolutely bulldozed the opposition, winning 20 straight sets, including the three matches she played in the qualifying tournament just to get into the main draw. She is the first qualifier, male or female, to win a Grand Slam tournament and will move up to No. 23 on Monday. Story by Dan Wolken. Photo by Robert Deutsch, @usatodaysports