Best American Moments at the 2017 #USOpen: 13-year-old @cocogauff took her wild card all the way to a runner-up finish and became the youngest girls’ singles finalist in tournament history. Send this #NetGeneration ambassador some ❤️ for an incredible run! #usta #ustennis #netgennetset #cocogauff #tennis #juniortennis #instatennis #instasports