Actress Sofia Carson and two-time U.S. Open champ Novak Djokovic will headline this year's Arthur Ashe Kids' Day. It is a stadium concert that organizers are hoping will increase interest in youth tennis. The annual event, which pays tribute to the late tennis great, is set for Aug. 26 at the USTA Billie Jean King National Tennis Center. The event is also being used to promote the United States Tennis Association's Net Generation initiative, which aims to get more children ages 5 to 18 playing the sport.