A fan has been ejected from a US Open round-of-16 match after German player Alexander Zverev complained the man used language from Adolf Hitler’s Nazi regime. Zverev, the No.12 seed, was serving at 2-2 in the fourth set of his match against No.6 Jannik Sinner when he suddenly went to chair umpire James Keothavong and pointed toward the fan, who was sitting in a section behind the umpire inside Arthur Ashe Stadium. “He just said the most famous Hitler phrase there is in this world,” Zverev told Keothavong. “It’s not acceptable.” Keothavong turned backward and asked the fan to identify...