The article offers information on tennis player Coco Gauff, who played lights-out tennis, won a title, and earned tremendous fan support at the age of 15. Topics include she being the youngest player to qualify for that Grand Slam in the Open era won two more matches at the tournament, and for Gauff, things couldn't have gotten much bigger than playing before a packed house at the U.S. Open, against the defending champion Naomi Osaka.