These are the Top 5 photos from opening day at the Billie Jean King USTA National Tennis Center. Zverev kept his perfect record against Kevin Anderson alive by overcoming a shaky opening performance.

“To really break a barrier, one young player has to win a Slam," Dominic Thiem said following his four-set triumph over Rafael Nadal. Thiem had defeated the Spaniard four times prior, but never ...