A fan was booted from a U.S. Open match early Tuesday morning after German player Alexander Zverev complained the man hurled Nazi slurs at him. Zverev, the No. 12 player in the world, was serving at 2-2 in the fourth set of his fourth-round match against No. 6 Jannik Sinner when he went to the chair umpire and complained about the fan, who was sitting nearby. “He just said the most famous Hitler phrase there is in this world,” Zverev told James Keothavong. “It’s not acceptable.” The fan was identified by spectators, and security removed him from the venue. “A...